diff --git a/samplecode/SampleRegion.cpp b/samplecode/SampleRegion.cpp
index 7e3e0d2..c29f090 100644
--- a/samplecode/SampleRegion.cpp
+++ b/samplecode/SampleRegion.cpp
@@ -123,7 +123,7 @@
 
 #ifdef SK_DEBUG
 static void make_rgn(SkRegion* rgn, int left, int top, int right, int bottom,
-                     size_t count, int32_t runs[]) {
+                     int count, int32_t runs[]) {
     SkIRect r;
     r.set(left, top, right, bottom);