diff --git a/core/css.js b/core/css.js
index e6ad5b584..c8b69a3eb 100644
--- a/core/css.js
+++ b/core/css.js
@@ -312,7 +312,7 @@ Blockly.Css.CONTENT = [
     Don't allow users to select text.  It gets annoying when trying to
     drag a block and selected text moves instead.
   */
-  '.blocklySvg text {',
+  '.blocklySvg text, .blocklyBlockDragSurface text {',
     'user-select: none;',
     '-moz-user-select: none;',
     '-webkit-user-select: none;',