diff --git a/build/scripts/build_cross_tools_gcc4 b/build/scripts/build_cross_tools_gcc4
index 00ed393b1b..31e1e0c7af 100755
--- a/build/scripts/build_cross_tools_gcc4
+++ b/build/scripts/build_cross_tools_gcc4
@@ -1,3 +1,5 @@
+#!/bin/sh
+#
 # parameters <machine> <haiku sourcedir> <buildtools dir> [ <haiku output dir> ]
 
 # get and check the parameters