diff --git a/js/reveal.js b/js/reveal.js
index 72756c154ff8846a70d06e1f752008cb6d9e254b..aa5cc7d32e9be37af17710597ac162b1426801e7 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -219,6 +219,8 @@ var Reveal = (function(){
 				else {
 					activateOverview();
 				}
+
+				event.preventDefault();
 			}
 		}
 	}