diff --git a/samplecode/ClockFaceView.cpp b/samplecode/ClockFaceView.cpp
index 0b1d293..6041e3f 100644
--- a/samplecode/ClockFaceView.cpp
+++ b/samplecode/ClockFaceView.cpp
@@ -85,6 +85,10 @@
         return true;
     }
 
+    void toString(SkString* str) const override {
+        str->appendf("InverseFillPE: ()");
+    }
+
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(InverseFillPE)
 
 private: