diff --git a/scripts/mkimage b/scripts/mkimage
index 6198fb7aa6..efd64e8670 100755
--- a/scripts/mkimage
+++ b/scripts/mkimage
@@ -318,7 +318,7 @@ fi
 
 # gzip
 echo "image: compressing..."
-gzip "${DISK}"
+gzip -f "${DISK}"
 
 # set owner
 if [ -n "${SUDO_USER}" ]; then