diff --git a/av1/common/onyxc_int.h b/av1/common/onyxc_int.h
index 3dc2a48..186ef16 100644
--- a/av1/common/onyxc_int.h
+++ b/av1/common/onyxc_int.h
@@ -866,7 +866,7 @@
   const int aligned_width = ALIGN_POWER_OF_TWO(width, cm->mib_size_log2);
 
   const int offset_y = mi_col_start << (MI_SIZE_LOG2 - tx_size_wide_log2[0]);
-  const int width_y = width << (MI_SIZE_LOG2 - tx_size_wide_log2[0]);
+  const int width_y = aligned_width << (MI_SIZE_LOG2 - tx_size_wide_log2[0]);
   const int offset_uv = offset_y >> cm->subsampling_x;
   const int width_uv = width_y >> cm->subsampling_x;