diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
index 55a380f82..48f324769 100644
--- a/source/CMakeLists.txt
+++ b/source/CMakeLists.txt
@@ -725,7 +725,6 @@ set (PCH_SOURCES
 	
 	thirdparty/src/base64.cpp
 	thirdparty/src/sjson.cpp
-	thirdparty/src/crc32.cpp
 	thirdparty/src/fix16.cpp
 	thirdparty/src/fix16_str.cpp
 	thirdparty/src/md4.cpp
diff --git a/source/blood/CMakeLists.txt b/source/blood/CMakeLists.txt
index 2df18ed54..7203e11b4 100644
--- a/source/blood/CMakeLists.txt
+++ b/source/blood/CMakeLists.txt
@@ -7,7 +7,7 @@ endif()
 include_directories( "${CMAKE_CURRENT_SOURCE_DIR}/../../build/include" )
 
 if (WIN32)
-	include_directories( "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/vpx" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/sdl2")
+	include_directories( "${ZLIB_INCLUDE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/vpx" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/sdl2")
 else ()
 include_directories( "${ZLIB_INCLUDE_DIR}" "${BZIP2_INCLUDE_DIR}" "${LZMA_INCLUDE_DIR}" "${JPEG_INCLUDE_DIR}" "${GDTOA_INCLUDE_DIR}")
 endif()
diff --git a/source/blood/src/db.cpp b/source/blood/src/db.cpp
index 6b35d8f6f..fd8c08622 100644
--- a/source/blood/src/db.cpp
+++ b/source/blood/src/db.cpp
@@ -26,7 +26,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #include "build.h"
 #include "compat.h"
 #include "common_game.h"
-#include "crc32_.h"
+#include "m_crc32.h"
 
 //#include "actor.h"
 #include "globals.h"
diff --git a/source/blood/src/replace.cpp b/source/blood/src/replace.cpp
index e9cad9ecf..2a48ed420 100644
--- a/source/blood/src/replace.cpp
+++ b/source/blood/src/replace.cpp
@@ -24,7 +24,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 #include "compat.h"
 #include "common_game.h"
-#include "crc32_.h"
+#include "m_crc32.h"
 
 #include "globals.h"
 #include "tile.h"
diff --git a/source/blood/src/resource.cpp b/source/blood/src/resource.cpp
index 5086641e4..7139f2598 100644
--- a/source/blood/src/resource.cpp
+++ b/source/blood/src/resource.cpp
@@ -26,7 +26,6 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
-#include "crc32_.h"
 #include "compat.h"
 #include "cache1d.h"
 #include "common_game.h"
diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index cc95040c5..33bfa955c 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -15,7 +15,6 @@
 #include "colmatch.h"
 #include "common.h"
 #include "compat.h"
-#include "crc32_.h"
 #include "engine_priv.h"
 #include "lz4.h"
 #include "osd.h"
@@ -7600,21 +7599,6 @@ static int32_t engineLoadTables(void)
         for (i=0; i<5120; i++)
             qradarang[10239-i] = -qradarang[i];
 
-#ifdef B_LITTLE_ENDIAN
-        i = 0;
-        if (Bcrc32((uint8_t *)sintable, sizeof(sintable), 0) != 0xee1e7aba)
-            i |= 1;
-        if (Bcrc32((uint8_t *)radarang, 640*sizeof(radarang[0]), 0) != 0xee893d92)
-            i |= 2;
-
-        if (i != 0)
-        {
-            static const char *str[3] = { "sine table", "arctangent table",
-                                          "sine and arctangent tables" };
-            initprintf("WARNING: Calculated %s differ%s from original!\n",
-                       str[i-1], i==3 ? "" : "s");
-        }
-#endif
         // TABLES.DAT format:
         //fr.Read(sintable,2048*2);
         //fr.Read(radarang,640*2);
@@ -8114,8 +8098,6 @@ int32_t enginePreInit(void)
 #endif
 
 
-    initcrc32table();
-
 #ifdef HAVE_CLIPSHAPE_FEATURE
     engineInitClipMaps();
 #endif
diff --git a/source/build/src/osd.cpp b/source/build/src/osd.cpp
index 4342df827..1be60b600 100644
--- a/source/build/src/osd.cpp
+++ b/source/build/src/osd.cpp
@@ -4,7 +4,6 @@
 
 #include "build.h"
 #include "cache1d.h"
-#include "crc32_.h"
 #include "compat.h"
 #include "baselayer.h"
 #include "osd.h"
@@ -15,6 +14,7 @@
 #include "keyboard.h"
 #include "control.h"
 #include "gamecontrol.h"
+#include "m_crc32.h"
 
 #define XXH_STATIC_LINKING_ONLY
 #include "xxhash.h"
diff --git a/source/build/src/tiles.cpp b/source/build/src/tiles.cpp
index 563808399..2271a0510 100644
--- a/source/build/src/tiles.cpp
+++ b/source/build/src/tiles.cpp
@@ -12,7 +12,6 @@
 #include "engine_priv.h"
 #include "cache1d.h"
 #include "lz4.h"
-#include "crc32_.h"
 
 #include "vfs.h"
 
diff --git a/source/common/utility/m_crc32.h b/source/common/utility/m_crc32.h
index b727d7a6b..079bffec4 100644
--- a/source/common/utility/m_crc32.h
+++ b/source/common/utility/m_crc32.h
@@ -50,3 +50,8 @@ inline uint32_t CRC1 (uint32_t crc, const uint8_t c, const uint32_t *crcTable)
 {
 	return crcTable[(crc & 0xff) ^ c] ^ (crc >> 8);
 }
+
+inline uint32_t Bcrc32(const void* data, int length, uint32_t crc)
+{
+	return crc32(crc, (const Bytef*)data, length);
+}
diff --git a/source/duke3d/CMakeLists.txt b/source/duke3d/CMakeLists.txt
index 077c06b2c..9d93f0abd 100644
--- a/source/duke3d/CMakeLists.txt
+++ b/source/duke3d/CMakeLists.txt
@@ -7,7 +7,7 @@ endif()
 include_directories( "${CMAKE_CURRENT_SOURCE_DIR}/../../build/include" )
 
 if (WIN32)
-	include_directories( "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/vpx" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/sdl2" )
+	include_directories( "${ZLIB_INCLUDE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/vpx" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/sdl2" )
 else ()
 include_directories( "${ZLIB_INCLUDE_DIR}" "${BZIP2_INCLUDE_DIR}" "${LZMA_INCLUDE_DIR}" "${JPEG_INCLUDE_DIR}" "${GDTOA_INCLUDE_DIR}")
 endif()
diff --git a/source/duke3d/src/game.cpp b/source/duke3d/src/game.cpp
index b4ef16ba7..8651d4f3b 100644
--- a/source/duke3d/src/game.cpp
+++ b/source/duke3d/src/game.cpp
@@ -28,7 +28,6 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #include "compat.h"
 #include "renderlayer.h"
 #include "osdcmds.h"
-#include "crc32_.h"
 #include "network.h"
 #include "menus.h"
 #include "savegame.h"
@@ -5909,8 +5908,6 @@ static void G_Startup(void)
     timerInit(TICRATE);
     timerSetCallback(gameTimerHandler);
 
-    initcrc32table();
-
     G_CompileScripts();
 
     if (engineInit())
diff --git a/source/duke3d/src/gamedef.cpp b/source/duke3d/src/gamedef.cpp
index 84a43db1a..9bf56cdf0 100644
--- a/source/duke3d/src/gamedef.cpp
+++ b/source/duke3d/src/gamedef.cpp
@@ -28,7 +28,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #include "cheats.h"
 #include "common.h"
 #include "common_game.h"
-#include "crc32_.h"
+#include "m_crc32.h"
 #include "duke3d.h"
 #include "gameexec.h"
 #include "namesdyn.h"
diff --git a/source/duke3d/src/network.cpp b/source/duke3d/src/network.cpp
index aadfaeba4..157bebc45 100644
--- a/source/duke3d/src/network.cpp
+++ b/source/duke3d/src/network.cpp
@@ -40,7 +40,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 #include "enet.h"
 #include "lz4.h"
-#include "crc32_.h"
+#include "m_crc32.h"
 
 #include "vfs.h"
 
diff --git a/source/rr/CMakeLists.txt b/source/rr/CMakeLists.txt
index a68b19e69..e503f5b0c 100644
--- a/source/rr/CMakeLists.txt
+++ b/source/rr/CMakeLists.txt
@@ -7,7 +7,7 @@ endif()
 include_directories( "${CMAKE_CURRENT_SOURCE_DIR}/../../build/include" )
 
 if (WIN32)
-	include_directories( "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/vpx" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/sdl2")
+	include_directories( "${ZLIB_INCLUDE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/vpx" "${CMAKE_CURRENT_SOURCE_DIR}/../../platform/windows/include/sdl2")
 else ()
 include_directories( "${ZLIB_INCLUDE_DIR}" "${BZIP2_INCLUDE_DIR}" "${LZMA_INCLUDE_DIR}" "${JPEG_INCLUDE_DIR}" "${GDTOA_INCLUDE_DIR}")
 endif()
diff --git a/source/rr/src/game.cpp b/source/rr/src/game.cpp
index 3751ec4e4..38e36b291 100644
--- a/source/rr/src/game.cpp
+++ b/source/rr/src/game.cpp
@@ -28,7 +28,6 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #include "compat.h"
 #include "renderlayer.h"
 #include "osdcmds.h"
-#include "crc32_.h"
 #include "net.h"
 #include "menus.h"
 #include "savegame.h"
@@ -7319,8 +7318,6 @@ static void G_Startup(void)
 
     timerInit(TICRATE);
 
-    initcrc32table();
-
     G_CompileScripts();
 
     enginecompatibility_mode = ENGINECOMPATIBILITY_19961112;
diff --git a/source/rr/src/gamedef.cpp b/source/rr/src/gamedef.cpp
index 4c642a979..9fe518009 100644
--- a/source/rr/src/gamedef.cpp
+++ b/source/rr/src/gamedef.cpp
@@ -33,7 +33,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #include "m_argv.h"
 
 #include "osd.h"
-#include "crc32_.h"
+#include "m_crc32.h"
 #include "printf.h"
 
 BEGIN_RR_NS
diff --git a/source/rr/src/net.cpp b/source/rr/src/net.cpp
index 3ccfafad2..38948868e 100644
--- a/source/rr/src/net.cpp
+++ b/source/rr/src/net.cpp
@@ -28,10 +28,10 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 #include "premap.h"
 #include "savegame.h"
 #include "input.h"
+#include "m_crc32.h"
 
 #include "enet.h"
 #include "lz4.h"
-#include "crc32_.h"
 
 BEGIN_RR_NS
 
diff --git a/source/thirdparty/include/crc32_.h b/source/thirdparty/include/crc32_.h
deleted file mode 100644
index 0fef21f05..000000000
--- a/source/thirdparty/include/crc32_.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef crc32_h_
-#define crc32_h_
-
-#include "compat.h"
-
-#define POLY 0xEDB88320
-
-#ifdef BITNESS64
-extern uint32_t crc32table[8][256];
-#else
-extern uint32_t crc32table[4][256];
-#endif
-
-extern uint32_t Bcrc32(const void* data, int length, uint32_t crc);
-extern void initcrc32table(void);
-
-#endif
diff --git a/source/thirdparty/src/crc32.cpp b/source/thirdparty/src/crc32.cpp
deleted file mode 100644
index 1b008d0df..000000000
--- a/source/thirdparty/src/crc32.cpp
+++ /dev/null
@@ -1,102 +0,0 @@
-// based on http://create.stephan-brumme.com/crc32/Crc32.cpp, zlib license
-
-#include "compat.h"
-#include "crc32_.h"
-
-uint32_t Bcrc32(const void* data, int length, uint32_t crc)
-{
-    const uint32_t* current = (const uint32_t*) data;
-    uint8_t const * currentChar;
-    crc = ~crc;
-
-#ifdef BITNESS64
-    // process eight bytes at once (Slicing-by-8)
-    while (length >= 8)
-    {
-#if B_BIG_ENDIAN != 0
-        uint32_t one = *current ^ B_SWAP32(crc);
-        uint32_t two = *(current+1);
-        crc  = crc32table[0][two       & 0xFF] ^
-               crc32table[1][(two>> 8) & 0xFF] ^
-               crc32table[2][(two>>16) & 0xFF] ^
-               crc32table[3][(two>>24) & 0xFF] ^
-               crc32table[4][one       & 0xFF] ^
-               crc32table[5][(one>> 8) & 0xFF] ^
-               crc32table[6][(one>>16) & 0xFF] ^
-               crc32table[7][(one>>24) & 0xFF];
-#else
-        uint32_t one = *current ^ crc;
-        uint32_t two = *(current+1);
-        crc  = crc32table[0][(two>>24) & 0xFF] ^
-               crc32table[1][(two>>16) & 0xFF] ^
-               crc32table[2][(two>> 8) & 0xFF] ^
-               crc32table[3][two       & 0xFF] ^
-               crc32table[4][(one>>24) & 0xFF] ^
-               crc32table[5][(one>>16) & 0xFF] ^
-               crc32table[6][(one>> 8) & 0xFF] ^
-               crc32table[7][one       & 0xFF];
-#endif
-        current += 2;
-        length -= 8;
-    }
-#else
-    // process four bytes at once (Slicing-by-4)
-    while (length >= 4)
-    {
-#if B_BIG_ENDIAN != 0
-        uint32_t one = *current++ ^ B_SWAP32(crc);
-        crc  = crc32table[0][one       & 0xFF] ^
-               crc32table[1][(one>> 8) & 0xFF] ^
-               crc32table[2][(one>>16) & 0xFF] ^
-               crc32table[3][(one>>24) & 0xFF];
-#else
-        uint32_t one = *current++ ^ crc;
-        crc  = crc32table[0][(one>>24) & 0xFF] ^
-               crc32table[1][(one>>16) & 0xFF] ^
-               crc32table[2][(one>> 8) & 0xFF] ^
-               crc32table[3][one       & 0xFF];
-#endif
-
-        length -= 4;
-    }
-#endif
-
-    currentChar = (uint8_t const *) current;
-    // remaining 1 to 7 bytes (standard algorithm)
-    while (length-- > 0)
-        crc = (crc >> 8) ^ crc32table[0][(crc & 0xFF) ^ *currentChar++];
-
-    return ~crc;
-}
-
-#ifdef BITNESS64
-uint32_t crc32table[8][256];
-#else
-uint32_t crc32table[4][256];
-#endif
-
-void initcrc32table(void)
-{
-    int i;
-    for (i = 0; i <= 0xFF; i++)
-    {
-      uint32_t j, crc = i;
-      for (j = 0; j < 8; j++)
-        crc = (crc >> 1) ^ ((crc & 1) * POLY);
-      crc32table[0][i] = crc;
-    }
-
-    for (i = 0; i <= 0xFF; i++)
-    {
-      crc32table[1][i] = (crc32table[0][i] >> 8) ^ crc32table[0][crc32table[0][i] & 0xFF];
-      crc32table[2][i] = (crc32table[1][i] >> 8) ^ crc32table[0][crc32table[1][i] & 0xFF];
-      crc32table[3][i] = (crc32table[2][i] >> 8) ^ crc32table[0][crc32table[2][i] & 0xFF];
-
-#ifdef BITNESS64
-      crc32table[4][i] = (crc32table[3][i] >> 8) ^ crc32table[0][crc32table[3][i] & 0xFF];
-      crc32table[5][i] = (crc32table[4][i] >> 8) ^ crc32table[0][crc32table[4][i] & 0xFF];
-      crc32table[6][i] = (crc32table[5][i] >> 8) ^ crc32table[0][crc32table[5][i] & 0xFF];
-      crc32table[7][i] = (crc32table[6][i] >> 8) ^ crc32table[0][crc32table[6][i] & 0xFF];
-#endif
-    }
-}