diff --git a/generators/javascript.js b/generators/javascript.js
index dcd1f146d..f14671899 100644
--- a/generators/javascript.js
+++ b/generators/javascript.js
@@ -229,7 +229,7 @@ Blockly.JavaScript.scrub_ = function(block, code) {
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
     // Collect comment for this block.
     var comment = block.getCommentText();
-    comment = Blockly.utils.wrap(comment, this.COMMENT_WRAP - 3);
+    comment = Blockly.utils.wrap(comment, Blockly.JavaScript.COMMENT_WRAP - 3);
     if (comment) {
       if (block.getProcedureDef) {
         // Use a comment block for function comments.
diff --git a/generators/lua.js b/generators/lua.js
index 60a6c0e14..6dbecb666 100644
--- a/generators/lua.js
+++ b/generators/lua.js
@@ -164,7 +164,7 @@ Blockly.Lua.scrub_ = function(block, code) {
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
     // Collect comment for this block.
     var comment = block.getCommentText();
-    comment = Blockly.utils.wrap(comment, this.COMMENT_WRAP - 3);
+    comment = Blockly.utils.wrap(comment, Blockly.Lua.COMMENT_WRAP - 3);
     if (comment) {
       commentCode += Blockly.Lua.prefixLines(comment, '-- ') + '\n';
     }
diff --git a/generators/php.js b/generators/php.js
index d935cda1b..b836c7bc1 100644
--- a/generators/php.js
+++ b/generators/php.js
@@ -167,7 +167,7 @@ Blockly.PHP.scrub_ = function(block, code) {
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
     // Collect comment for this block.
     var comment = block.getCommentText();
-    comment = Blockly.utils.wrap(comment, this.COMMENT_WRAP - 3);
+    comment = Blockly.utils.wrap(comment, Blockly.PHP.COMMENT_WRAP - 3);
     if (comment) {
       commentCode += Blockly.PHP.prefixLines(comment, '// ') + '\n';
     }
diff --git a/generators/python.js b/generators/python.js
index 2e77c0753..082480685 100644
--- a/generators/python.js
+++ b/generators/python.js
@@ -202,7 +202,7 @@ Blockly.Python.scrub_ = function(block, code) {
   if (!block.outputConnection || !block.outputConnection.targetConnection) {
     // Collect comment for this block.
     var comment = block.getCommentText();
-    comment = Blockly.utils.wrap(comment, this.COMMENT_WRAP - 3);
+    comment = Blockly.utils.wrap(comment, Blockly.Python.COMMENT_WRAP - 3);
     if (comment) {
       if (block.getProcedureDef) {
         // Use a comment block for function comments.