diff --git a/samplecode/SampleUnitMapper.cpp b/samplecode/SampleUnitMapper.cpp
index c9a8f9f..db9af09 100644
--- a/samplecode/SampleUnitMapper.cpp
+++ b/samplecode/SampleUnitMapper.cpp
@@ -141,7 +141,7 @@
         return -1;
     }
 
-    virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
+    virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) SK_OVERRIDE {
         fDragIndex = hittest(x, y);
         return fDragIndex >= 0 ? new Click(this) : NULL;
     }