diff --git a/comment/comment.js b/comment/comment.js
index ea19518c311..6c0e310b75f 100644
--- a/comment/comment.js
+++ b/comment/comment.js
@@ -301,6 +301,7 @@ M.core_comment = {
                                 scope.dodelete(commentid[1]);
                             }
                         }, '13,32');
+                        // 13 and 32 are the keycodes for space and enter.
                     }
                 );
             },