diff --git a/xpcom/components/StaticComponents.h b/xpcom/components/StaticComponents.h
index c3dbd25116b3..ac4095f2f35e 100644
--- a/xpcom/components/StaticComponents.h
+++ b/xpcom/components/StaticComponents.h
@@ -242,9 +242,9 @@ struct StaticProtocolHandler final {
   }
 
   StringOffset mScheme;
-  ModuleID mModuleID;
   uint32_t mProtocolFlags;
   int32_t mDefaultPort;
+  ModuleID mModuleID;
   bool mHasDynamicFlags;
 
   nsCString Scheme() const;