diff --git a/generators/dart.js b/generators/dart.js
index 6fb1236d4..feec82a2c 100644
--- a/generators/dart.js
+++ b/generators/dart.js
@@ -191,6 +191,7 @@ Blockly.Dart.scrub_ = function(block, code) {
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
     // Collect comment for this block.
     var comment = block.getCommentText();
+    comment = Blockly.utils.wrap(comment, Blockly.Dart.COMMENT_WRAP - 3);
     if (comment) {
       if (block.getProcedureDef) {
         // Use documentation comment for function comments.