--- a/mfbt/Maybe.h
+++ b/mfbt/Maybe.h
@@ -77,18 +77,18 @@ struct Nothing { };
  *
  * N.B. GCC has missed optimizations with Maybe in the past and may generate
  * extra branches/loads/stores. Use with caution on hot paths; it's not known
  * whether or not this is still a problem.
  */
 template<class T>
 class Maybe
 {
+  AlignedStorage2<T> mStorage;
   bool mIsSome;
-  AlignedStorage2<T> mStorage;
 
 public:
   typedef T ValueType;
 
   Maybe() : mIsSome(false) { }
   ~Maybe() { reset(); }
 
   MOZ_IMPLICIT Maybe(Nothing) : mIsSome(false) { }