diff --git a/src/addtohomescreen.js b/src/addtohomescreen.js
index 3b52c91..bf7a4cd 100644
--- a/src/addtohomescreen.js
+++ b/src/addtohomescreen.js
@@ -664,8 +664,7 @@
 
 			this._canPrompt = false;
 
-			if ( _instance.options.customCriteria !== null ||
-				_instance.options.customCriteria !== undefined ) {
+			if ( _instance.options.customCriteria) {
 
 				var passCustom = false;
 
@@ -995,4 +994,4 @@
 	// expose to the world
 	window.addToHomescreen = ath;
 
-} )( window, document );
\ No newline at end of file
+} )( window, document );