diff --git a/tools/find-changed-builds.py b/tools/find-changed-builds.py
index 7558a2e3ff..731ebd6f1e 100755
--- a/tools/find-changed-builds.py
+++ b/tools/find-changed-builds.py
@@ -14,7 +14,7 @@ for appid in sorted(changed):
     metadata_file = 'metadata/%s.yml' % appid
     diff = subprocess.check_output(
         (
-            'git diff --no-color --diff-filter=d FETCH_HEAD...HEAD -- ' + metadata_file
+            'git diff --no-color --diff-filter=d HEAD^...HEAD -- ' + metadata_file
         ).split(' ')
     )