diff --git a/rebuild-image b/rebuild-image
index 0e582b0ba..0eb3cff3c 100755
--- a/rebuild-image
+++ b/rebuild-image
@@ -29,7 +29,7 @@ cached_image_rev() {
 has_changes() {
 	local rev1=$1
 	local rev2=$2
-	local changes=$(git log --oneline $rev1..$rev2 -- $INPUTFILES | wc -l)
+	local changes=$(git diff --oneline $rev1..$rev2 -- $INPUTFILES | wc -l)
 	[ "$changes" -gt 0 ]
 }