diff --git a/dom/ipc/TabParent.cpp b/dom/ipc/TabParent.cpp
index 5c30387886e..b050f8c70b6 100644
--- a/dom/ipc/TabParent.cpp
+++ b/dom/ipc/TabParent.cpp
@@ -2327,6 +2327,7 @@ TabParent::RecvEndIMEComposition(const bool& aCancel,
 {
   nsCOMPtr<nsIWidget> widget = GetWidget();
   if (!widget) {
+    *aNoCompositionEvent = false;
     return true;
   }
   *aNoCompositionEvent =