diff --git a/vp8/encoder/onyx_int.h b/vp8/encoder/onyx_int.h
index b934d98..889bf73 100644
--- a/vp8/encoder/onyx_int.h
+++ b/vp8/encoder/onyx_int.h
@@ -523,8 +523,8 @@
     int motion_lvl;
     int motion_speed;
     int motion_var;
-    int next_iiratio;
-    int this_iiratio;
+    unsigned int next_iiratio;
+    unsigned int this_iiratio;
     int this_frame_modified_error;
 
     double norm_intra_err_per_mb;