diff --git a/drmdisplaycomposition.h b/drmdisplaycomposition.h
index 09ad3ff..1df8dee 100644
--- a/drmdisplaycomposition.h
+++ b/drmdisplaycomposition.h
@@ -76,6 +76,7 @@
 
   int timeline_fd_;
   int timeline_;
+  int timeline_current_;
 
   DrmCompositionLayerVector_t layers_;
   uint32_t dpms_mode_;