diff --git a/vsyncworker.h b/vsyncworker.h
index 231fef2..787152e 100644
--- a/vsyncworker.h
+++ b/vsyncworker.h
@@ -41,7 +41,7 @@
   ~VSyncWorker() override;
 
   int Init(DrmResources *drm, int display);
-  int RegisterCallback(std::shared_ptr<VsyncCallback> callback);
+  void RegisterCallback(std::shared_ptr<VsyncCallback> callback);
 
   void VSyncControl(bool enabled);