diff --git a/scripts/common-functions b/scripts/common-functions
index 43c8246..6282072 100644
--- a/scripts/common-functions
+++ b/scripts/common-functions
@@ -181,7 +181,7 @@ sha_in_upstream()
     [ -z "$sha" ] && fail "sha_in_upstream: No sha provided"
     [ -z "$upstream_git" ] && fail "sha_in_upstream: No upstream git tree"
 
-    sha_merged_in_upstream_tag $sha origin/HEAD $upstream_git
+    sha_merged_in_upstream_tag $sha origin/master $upstream_git
 }