diff --git a/js/reveal.js b/js/reveal.js
index 3bd75a29..dd2f990e 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -3902,7 +3902,7 @@
 
 		// Returns true if we're currently on the first slide
 		isFirstSlide: function() {
-			return ( indexh == 0 && indexv == 0 );
+			return ( indexh === 0 && indexv === 0 );
 		},
 
 		// Returns true if we're currently on the last slide