diff --git a/build/scripts/build_cross_tools_gcc4 b/build/scripts/build_cross_tools_gcc4
index 775be3a128..5d8f5434ef 100755
--- a/build/scripts/build_cross_tools_gcc4
+++ b/build/scripts/build_cross_tools_gcc4
@@ -140,7 +140,7 @@ $MAKE install || {
 # remove the system headers from the installation dir
 # Only the ones from the source tree should be used.
 sysIncludeDir=$installDir/$haikuMachine/sys-include
-rm -rf $sysIncludeDir/be $sysIncludeDir/posix
+rm -rf $sysIncludeDir/os $sysIncludeDir/posix
 
 # remove the objects dir
 rm -rf $objDir