diff --git a/src/applications/transactions/editfield/PhabricatorCommentEditField.php b/src/applications/transactions/editfield/PhabricatorCommentEditField.php
--- a/src/applications/transactions/editfield/PhabricatorCommentEditField.php
+++ b/src/applications/transactions/editfield/PhabricatorCommentEditField.php
@@ -11,6 +11,10 @@
     return new PhabricatorCommentEditType();
   }
 
+  public function shouldGenerateTransactionsFromSubmit() {
+    return false;
+  }
+
   public function shouldGenerateTransactionsFromComment() {
     return true;
   }