diff --git a/test/i420_video_source.h b/test/i420_video_source.h
index 12a6ab1d3ff896af12a2487f5a7e5ca96a11b318..0dc29319c65c3f6d0d59c0dd7c163436240054b2 100644
--- a/test/i420_video_source.h
+++ b/test/i420_video_source.h
@@ -108,8 +108,8 @@ class I420VideoSource : public VideoSource {
   unsigned int frame_;
   unsigned int width_;
   unsigned int height_;
-  unsigned int framerate_numerator_;
-  unsigned int framerate_denominator_;
+  int framerate_numerator_;
+  int framerate_denominator_;
 };
 
 }  // namespace libvpx_test