diff --git a/layout/base/nsPresShell.cpp b/layout/base/nsPresShell.cpp
index b1fb8b77eda..ac4cd9257ee 100644
--- a/layout/base/nsPresShell.cpp
+++ b/layout/base/nsPresShell.cpp
@@ -7193,6 +7193,7 @@ PresShell::HandleKeyboardEvent(nsINode* aTarget,
 
   // Dispatch after events to partial items.
   if (defaultPrevented) {
+    *aStatus = nsEventStatus_eConsumeNoDefault;
     DispatchAfterKeyboardEventInternal(chain, aEvent,
                                        aEvent.mFlags.mDefaultPrevented, chainIndex);