diff --git a/drm/VSyncWorker.cpp b/drm/VSyncWorker.cpp
index 64152ab..defbe42 100644
--- a/drm/VSyncWorker.cpp
+++ b/drm/VSyncWorker.cpp
@@ -124,7 +124,7 @@
   if (last_timestamp_ < 0)
     return current + frame_ns;
 
-  return frame_ns * ((current - last_timestamp_) / frame_ns + 1) +
+  return (frame_ns * ((current - last_timestamp_) / frame_ns + 1)) +
          last_timestamp_;
 }