diff --git a/scripts/setlocalversion b/scripts/setlocalversion
index b7bc0f5..82e4993 100644
--- a/scripts/setlocalversion
+++ b/scripts/setlocalversion
@@ -16,7 +16,7 @@
 	fi
 
 	# Are there uncommitted changes?
-	if git diff-files | read dummy; then
+	if git diff-index HEAD | read dummy; then
 		printf '%s' -dirty
 	fi
 fi