diff --git a/platform/common/vapi-background.js b/platform/common/vapi-background.js
index 2af01c204..cd035ab81 100644
--- a/platform/common/vapi-background.js
+++ b/platform/common/vapi-background.js
@@ -1376,6 +1376,7 @@ vAPI.Net = class {
     //   soon as there is a call to clear for one tab.
     removeUnprocessedRequest() {
         this.unprocessedTabs.clear();
+        if ( this.deferredSuspendableListener === undefined ) { return true; }
         if ( this.unprocessedTabs.size !== 0 ) { return false; }
         this.suspendableListener = this.deferredSuspendableListener;
         this.deferredSuspendableListener = undefined;