diff --git a/platformnv.h b/platformnv.h
index 3c1f49e..7e2784f 100644
--- a/platformnv.h
+++ b/platformnv.h
@@ -83,7 +83,7 @@
                       std::map<size_t, DrmHwcLayer *> &layers, DrmCrtc *crtc,
                       std::vector<DrmPlane *> *planes);
  protected:
-  bool CheckLayer(DrmHwcLayer *layer);
+  bool CheckLayer(size_t zorder, DrmHwcLayer *layer);
 };
 }