diff --git a/deeplink-to-native-app.js b/deeplink-to-native-app.js
index 8d87caf..87b0018 100755
--- a/deeplink-to-native-app.js
+++ b/deeplink-to-native-app.js
@@ -215,7 +215,10 @@ var NativeAppLauncher = (function($) {
             var id = strategyParameters.getAppLauncherEl().attr('id');
             $("body").on('click',  '#' + id, function(e) {
                 e.preventDefault();
-                alert(strategyParameters.getNotSupportedMessage());
+                if (strategyParameters.getNotSupportedMessage()) {
+                    alert(strategyParameters.getNotSupportedMessage());
+                }
+
             })
         }
     };