diff --git a/src/ol/control/fullscreencontrol.js b/src/ol/control/fullscreencontrol.js
index 0086d93339..8126320769 100644
--- a/src/ol/control/fullscreencontrol.js
+++ b/src/ol/control/fullscreencontrol.js
@@ -37,9 +37,10 @@ ol.control.FullScreen = function(opt_options) {
    * @private
    * @type {string}
    */
-  this.cssClassName_ = options.className ? options.className : 'ol-full-screen';
+  this.cssClassName_ = options.className !== undefined ? options.className :
+      'ol-full-screen';
 
-  var label = options.label ? options.label : '\u2922';
+  var label = options.label !== undefined ? options.label : '\u2922';
 
   /**
    * @private
@@ -48,7 +49,7 @@ ol.control.FullScreen = function(opt_options) {
   this.labelNode_ = typeof label === 'string' ?
       document.createTextNode(label) : label;
 
-  var labelActive = options.labelActive ? options.labelActive : '\u00d7';
+  var labelActive = options.labelActive !== undefined ? options.labelActive : '\u00d7';
 
   /**
    * @private