diff --git a/detect-compiler b/detect-compiler
index 11d60da5b7..50087f5670 100755
--- a/detect-compiler
+++ b/detect-compiler
@@ -9,7 +9,7 @@ CC="$*"
 #
 # FreeBSD clang version 3.4.1 (tags/RELEASE...)
 get_version_line() {
-	$CC -v 2>&1 | grep ' version '
+	LANG=C LC_ALL=C $CC -v 2>&1 | grep ' version '
 }
 
 get_family() {