diff --git a/build/scripts/build_cross_tools b/build/scripts/build_cross_tools
index b35bd8107d..9e2fd4edb0 100755
--- a/build/scripts/build_cross_tools
+++ b/build/scripts/build_cross_tools
@@ -189,8 +189,7 @@ rm -f $installDir/lib/gcc-lib/i586-pc-haiku/$haikuRequiredLegacyGCCVersion/inclu
 
 # remove the system headers from the installation dir
 # Only the ones from the source tree should be used.
-sysIncludeDir=$installDir/i586-pc-haiku/sys-include
-rm -rf $sysIncludeDir/be $sysIncludeDir/posix
+rm -rf $installDir/i586-pc-haiku/sys-include
 
 # remove the objects dir
 rm -rf $objDir
diff --git a/build/scripts/build_cross_tools_gcc4 b/build/scripts/build_cross_tools_gcc4
index 8e6c732f0d..e22ef70238 100755
--- a/build/scripts/build_cross_tools_gcc4
+++ b/build/scripts/build_cross_tools_gcc4
@@ -247,8 +247,7 @@ fi
 
 # remove the system headers from the installation dir
 # Only the ones from the source tree should be used.
-sysIncludeDir=$installDir/$haikuMachine/sys-include
-rm -rf $sysIncludeDir/os $sysIncludeDir/posix
+rm -rf $installDir/$haikuMachine/sys-include
 
 # remove the objects dir
 rm -rf $objDir