diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e303850a..9b20d971 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -321,7 +321,7 @@ if(${SRB2_CONFIG_HAVE_GME})
 	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
 		set(GME_FOUND ON)
 		set(GME_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/gme/include)
-		set(GME_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/gme/ -lgme")
+		set(GME_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/gme/win32 -lgme")
 	else()
 		find_package(GME)
 	endif()
@@ -337,7 +337,11 @@ if(${SRB2_CONFIG_HAVE_ZLIB})
 	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
 		set(ZLIB_FOUND ON)
 		set(ZLIB_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/zlib)
-		set(ZLIB_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/zlib/win32 -lz32")
+		if(${SRB2_SYSTEM_BITS} EQUAL 64)
+			set(ZLIB_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/zlib/win32 -lz64")
+		else() # 32-bit
+			set(ZLIB_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/zlib/win32 -lz32")
+		endif()
 	else()
 		find_package(ZLIB)
 	endif()
@@ -353,7 +357,11 @@ if(${SRB2_CONFIG_HAVE_PNG} AND ${SRB2_CONFIG_HAVE_ZLIB})
 		if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
 			set(PNG_FOUND ON)
 			set(PNG_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/libpng-src)
-			set(PNG_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/libpng-src/projects -lpng32")
+			if(${SRB2_SYSTEM_BITS} EQUAL 64)
+				set(PNG_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/libpng-src/projects -lpng64")
+			else() # 32-bit
+				set(PNG_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/libpng-src/projects -lpng32")
+			endif()
 		else()
 			find_package(PNG)
 		endif()
diff --git a/src/sdl/CMakeLists.txt b/src/sdl/CMakeLists.txt
index e929558c..50fb7a57 100644
--- a/src/sdl/CMakeLists.txt
+++ b/src/sdl/CMakeLists.txt
@@ -5,8 +5,13 @@ set(SRB2_CONFIG_SDL2_USEMIXER ON CACHE BOOL "Use SDL2_mixer or regular sdl sound
 if(${SRB2_CONFIG_SDL2_USEMIXER})
 	if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
 		set(SDL2_MIXER_FOUND ON)
-		set(SDL2_MIXER_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/i686-w64-mingw32/include/SDL2)
-		set(SDL2_MIXER_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/i686-w64-mingw32/lib -lSDL2_mixer")
+		if(${SRB2_SYSTEM_BITS} EQUAL 64)
+			set(SDL2_MIXER_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/x86_64-w64-mingw32/include/SDL2)
+			set(SDL2_MIXER_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/x86_64-w64-mingw32/lib -lSDL2_mixer")
+		else() # 32-bit
+			set(SDL2_MIXER_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/i686-w64-mingw32/include/SDL2)
+			set(SDL2_MIXER_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2_mixer/i686-w64-mingw32/lib -lSDL2_mixer")
+		endif()
 	else()
 		find_package(SDL2_mixer)
 	endif()
@@ -50,8 +55,13 @@ source_group("Interface Code" FILES ${SRB2_SDL2_SOURCES} ${SRB2_SDL2_HEADERS})
 # Dependency
 if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
 	set(SDL2_FOUND ON)
-	set(SDL2_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/include/SDL2)
-	set(SDL2_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/lib -lSDL2")
+	if(${SRB2_SYSTEM_BITS} EQUAL 64)
+		set(SDL2_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/include/SDL2)
+		set(SDL2_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/lib -lSDL2")
+	else() # 32-bit
+		set(SDL2_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/include/SDL2)
+		set(SDL2_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/lib -lSDL2")
+	endif()
 else()
 	find_package(SDL2)
 endif()
@@ -199,8 +209,13 @@ if(${SDL2_FOUND})
 	if(MSVC)
 		if(${SRB2_CONFIG_USE_INTERNAL_LIBRARIES})
 			set(SDL2_MAIN_FOUND ON)
-			set(SDL2_MAIN_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/include/SDL2)
-			set(SDL2_MAIN_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/lib -lSDL2main")
+			if(${SRB2_SYSTEM_BITS} EQUAL 64)
+				set(SDL2_MAIN_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/include/SDL2)
+				set(SDL2_MAIN_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/x86_64-w64-mingw32/lib -lSDL2main")
+			else() # 32-bit
+				set(SDL2_MAIN_INCLUDE_DIRS ${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/include/SDL2)
+				set(SDL2_MAIN_LIBRARIES "-L${CMAKE_SOURCE_DIR}/libs/SDL2/i686-w64-mingw32/lib -lSDL2main")
+			endif()
 		else()
 			find_package(SDL2_MAIN REQUIRED)
 		endif()