diff --git a/js/reveal.js b/js/reveal.js
index 72756c1..aa5cc7d 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -219,6 +219,8 @@ var Reveal = (function(){
 				else {
 					activateOverview();
 				}
+
+				event.preventDefault();
 			}
 		}
 	}