--- a/xpcom/build/IOInterposer.h
+++ b/xpcom/build/IOInterposer.h
@@ -248,24 +248,24 @@ void EnteringNextStage();
 
 } // namespace IOInterposer
 
 class IOInterposerInit
 {
 public:
   IOInterposerInit()
   {
-#if defined(MOZ_ENABLE_PROFILER_SPS)
+#if !defined(RELEASE_BUILD)
     IOInterposer::Init();
 #endif
   }
 
   ~IOInterposerInit()
   {
-#if defined(MOZ_ENABLE_PROFILER_SPS)
+#if !defined(RELEASE_BUILD)
     IOInterposer::Clear();
 #endif
   }
 };
 
 } // namespace mozilla
 
 #endif // mozilla_IOInterposer_h