diff --git a/dom/plugins/PluginInstanceParent.cpp b/dom/plugins/PluginInstanceParent.cpp
index 4c63a3a84e45..116322e9fb8c 100644
--- a/dom/plugins/PluginInstanceParent.cpp
+++ b/dom/plugins/PluginInstanceParent.cpp
@@ -498,6 +498,7 @@ PluginInstanceParent::NPP_HandleEvent(void* event)
                 if (!CallNPP_HandleEvent(npremoteevent, &handled))
                     return 0;
             }
+            break;
             default:
                 if (!CallNPP_HandleEvent(npremoteevent, &handled))
                     return 0;