diff --git a/mobile/android/modules/geckoview/GeckoViewTab.jsm b/mobile/android/modules/geckoview/GeckoViewTab.jsm
index a3aec8b8de32..325dec8f6257 100644
--- a/mobile/android/modules/geckoview/GeckoViewTab.jsm
+++ b/mobile/android/modules/geckoview/GeckoViewTab.jsm
@@ -30,6 +30,10 @@ class GeckoViewTab extends GeckoViewModule {
       tabs: [tab],
       selectedTab: tab,
 
+      closeTab: function(aTab) {
+        // not implemented
+      },
+
       getTabForId: function(aId) {
         return this.selectedTab;
       },