diff --git a/core/toolbox/toolbox.js b/core/toolbox/toolbox.js
index d96bde6d2..ff039e1dd 100644
--- a/core/toolbox/toolbox.js
+++ b/core/toolbox/toolbox.js
@@ -407,6 +407,7 @@ Blockly.Toolbox.prototype.render = function(toolboxDef) {
   this.contentMap_ = Object.create(null);
   this.renderContents_(toolboxDef['contents']);
   this.position();
+  this.handleToolboxItemResize();
 };
 
 /**