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-rw-r--r--kaios/kaiads-glue.js2
1 files changed, 1 insertions, 1 deletions
diff --git a/kaios/kaiads-glue.js b/kaios/kaiads-glue.js
index 8614e24..62634b2 100644
--- a/kaios/kaiads-glue.js
+++ b/kaios/kaiads-glue.js
@@ -11,7 +11,7 @@
(function() {
// To run, we need to be on KaiOS with the KaiAds SDK and the
// Open Web Apps API.
- if (!getKaiAd || !navigator.mozApps ||
+ if (getKaiAd === undefined || navigator.mozApps === undefined ||
navigator.userAgent.toLowerCase().indexOf('kaios') == -1) return;
// If those prerequisites are satisfied, install the button.
var advertbutton = document.createElement("button");