diff --git a/project.py b/project.py
index b8a347d..ffbdfd1 100644
--- a/project.py
+++ b/project.py
@@ -563,7 +563,7 @@ class Project(object):
           _info("[%s] Consider merging or rebasing the"
                 " unpublished commits.", self.name)
         return True
-      else:
+      elif upstream_gain:
         # We can fast-forward safely.
         #
         try:
@@ -572,6 +572,10 @@ class Project(object):
           return False
         self._CopyFiles()
         return True
+      else:
+        # Trivially no changes in the upstream.
+        #
+        return True
 
     if merge == rev:
       try: