diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d00b88824..9b763dee3 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -6,6 +6,7 @@ endif( COMMAND cmake_policy )
 
 include( CheckCXXSourceCompiles )
 include( CheckFunctionExists )
+include( CheckCXXCompilerFlag )
 include( FindPkgConfig )
 
 option( NO_ASM "Disable assembly code" )
@@ -37,7 +38,7 @@ set( MINOR_VERSIONS "50" "49" "48" "47" "46" "45" "44" "43" "42" "41"
 	"27" "26" "25" "24" "23" "22" "21" "20" "21" "19" "18" "17" "16"
 	"15" "14" "13" "12" "11" "10" "09" "08" "07" "06" "05" "04" "03"
 	"02" "01" "00" )
-set( MAJOR_VERSIONS "26" "24" "22" "20" )
+set( MAJOR_VERSIONS "30" "28" "26" "24" "22" "20" )
 set( FMOD_DIR_VERSIONS ${FMOD_DIR_VERSIONS} "../fmod" )
 foreach( majver ${MAJOR_VERSIONS} )
 	foreach( minver ${MINOR_VERSIONS} )
diff --git a/src/nodebuild.cpp b/src/nodebuild.cpp
index 8298e9017..cbeb23f77 100644
--- a/src/nodebuild.cpp
+++ b/src/nodebuild.cpp
@@ -1082,6 +1082,7 @@ __declspec(dllimport) int __stdcall VirtualProtect(void *, unsigned long, unsign
 #else
 #include <sys/mman.h>
 #include <limits.h>
+#include <unistd.h>
 #endif
 
 #ifdef __GNUC__