diff --git a/samplecode/SampleClock.cpp b/samplecode/SampleClock.cpp
index 040efa1..347b2ea 100644
--- a/samplecode/SampleClock.cpp
+++ b/samplecode/SampleClock.cpp
@@ -210,7 +210,7 @@
         canvas->restore();
     }
 
-    bool onAnimate(const AnimTimer&) override { return true; }
+    bool onAnimate(double /*nanos*/) override { return true; }
 
 private: