diff --git a/core/blockly.js b/core/blockly.js
index ca1dcb83f..562af5f29 100644
--- a/core/blockly.js
+++ b/core/blockly.js
@@ -281,7 +281,7 @@ Blockly.copy_ = function(toCopy) {
   if (toCopy.isComment) {
     var xml = toCopy.toXmlWithXY();
   } else {
-    var xml = Blockly.Xml.blockToDom(toCopy);
+    var xml = Blockly.Xml.blockToDom(toCopy, true);
     // Copy only the selected block and internal blocks.
     Blockly.Xml.deleteNext(xml);
     // Encode start position in XML.
diff --git a/core/flyout_base.js b/core/flyout_base.js
index ab77802f9..61ffed7cb 100644
--- a/core/flyout_base.js
+++ b/core/flyout_base.js
@@ -794,7 +794,7 @@ Blockly.Flyout.prototype.placeNewBlock_ = function(oldBlock) {
   }
 
   // Create the new block by cloning the block in the flyout (via XML).
-  var xml = Blockly.Xml.blockToDom(oldBlock);
+  var xml = Blockly.Xml.blockToDom(oldBlock, true);
   // The target workspace would normally resize during domToBlock, which will
   // lead to weird jumps.  Save it for terminateDrag.
   targetWorkspace.setResizesEnabled(false);