diff --git a/include/shell.sh b/include/shell.sh
index db41003262..f6be6c526f 100644
--- a/include/shell.sh
+++ b/include/shell.sh
@@ -30,5 +30,5 @@ trapret() {(
 )}
 
 md5s() {
-	which md5sum 2>&- >&- && md5sum "$@" | awk '{print $1}' || md5 "$@"
+	which md5sum 2>&1 >/dev/null && md5sum "$@" | awk '{print $1}' || md5 "$@"
 }