diff --git a/core/flyout.js b/core/flyout.js
index 3caa8deaa..d8a64d94a 100644
--- a/core/flyout.js
+++ b/core/flyout.js
@@ -569,7 +569,7 @@ Blockly.Flyout.prototype.show = function(xmlList) {
 
   this.layoutBlocks_(blocks, gaps);
 
-  // IE 11 is an incompetant browser that fails to fire mouseout events.
+  // IE 11 is an incompetent browser that fails to fire mouseout events.
   // When the mouse is over the background, deselect all blocks.
   var deselectAll = function() {
     var topBlocks = this.workspace_.getTopBlocks(false);