diff --git a/pkgs/build-support/gcc-cross-wrapper/builder.sh b/pkgs/build-support/gcc-cross-wrapper/builder.sh
index 1bdda9696536..b729144b8601 100644
--- a/pkgs/build-support/gcc-cross-wrapper/builder.sh
+++ b/pkgs/build-support/gcc-cross-wrapper/builder.sh
@@ -8,7 +8,7 @@ mkdir $out/nix-support
 cflagsCompile="-B$out/bin/"
 
 if test -z "$nativeLibc" -a -n "$libc"; then
-    cflagsCompile="$cflagsCompile -B$gccLibs/lib -B$libc/lib/ -isystem $libc/include"
+    cflagsCompile="$cflagsCompile -B$gccLibs/lib -B$libc/lib/ -isystem $libc_dev/include"
     ldflags="$ldflags -L$libc/lib"
     # Get the proper dynamic linker for glibc and uclibc. 
     dlinker=`eval 'echo $libc/lib/ld*.so.?'`