diff --git a/scripts/pgit.sh b/scripts/pgit.sh
index 9a35b7e3..99cedf78 100644
--- a/scripts/pgit.sh
+++ b/scripts/pgit.sh
@@ -119,7 +119,7 @@ diff()
 	cd $pdir
 	for d in $pdirs; do
 		# marker $d
-		run_git -C $d diff --src-prefix=a/$d/ --dst-prefix=b/$d/ "$@"
+		run_git -C $d diff --src-prefix=$d/ --dst-prefix=$d/ "$@"
 	done
 )}