diff --git a/scripts/gen_build_files.sh b/scripts/gen_build_files.sh
index 92de681ac..8b5b15a1b 100755
--- a/scripts/gen_build_files.sh
+++ b/scripts/gen_build_files.sh
@@ -4,6 +4,8 @@
 # but users complain that many sed implementations
 # are misinterpreting --.
 
+export LC_ALL=C
+
 test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
 
 # cd to objtree