diff --git a/src/operator/contrib/roi_align.cc b/src/operator/contrib/roi_align.cc
index 623b0ee410a0..dc4aa8b7de9e 100644
--- a/src/operator/contrib/roi_align.cc
+++ b/src/operator/contrib/roi_align.cc
@@ -564,7 +564,7 @@ He, Kaiming, et al. "Mask R-CNN." ICCV, 2017
   out_shape->clear();
   if (param.position_sensitive) {
     CHECK_EQ(dshape[1] % (param.pooled_size[0]*param.pooled_size[1]), 0) <<
-      "Input channels shuold be divided by pooled_size[0]*pooled_size[1]";
+      "Input channels should be divided by pooled_size[0]*pooled_size[1]";
     out_shape->push_back(
          Shape4(bshape[0], dshape[1]/param.pooled_size[0]/param.pooled_size[1],
                 param.pooled_size[0], param.pooled_size[1]));