diff --git a/src/KDFoundation/platform/macos/macos_platform_event_loop.h b/src/KDFoundation/platform/macos/macos_platform_event_loop.h
index 3087398..7574345 100644
--- a/src/KDFoundation/platform/macos/macos_platform_event_loop.h
+++ b/src/KDFoundation/platform/macos/macos_platform_event_loop.h
@@ -38,10 +38,11 @@ class KDFOUNDATION_API MacOSPlatformEventLoop : public AbstractPlatformEventLoop
 
     static void postEmptyEvent();
 
-    std::unordered_map<void *, MacOSPlatformTimer *> timerMap;
-
 private:
     std::unique_ptr<AbstractPlatformTimer> createPlatformTimerImpl(Timer *timer) override;
+
+    std::unordered_map<void *, MacOSPlatformTimer *> timerMap;
+    friend class MacOSPlatformTimer;
 };
 
 } // namespace KDFoundation