diff --git a/pagure/templates/pull_request.html b/pagure/templates/pull_request.html
index fd0c41e..3e314fc 100644
--- a/pagure/templates/pull_request.html
+++ b/pagure/templates/pull_request.html
@@ -443,7 +443,8 @@
           +res.message+'">'+res.short_code+'</span></li>'));
       },
       error: function() {
-        alert('Unable to generate preview!');
+        var _obj = $('.header .buttons');
+        _obj.prepend($('<li>Could not determine if the PR can be merged</li>'));
       }
     });
     return false;