diff --git a/src/operators/dropout_op.cpp b/src/operators/dropout_op.cpp
index ade81ac7fa0688a46f922c1a7f3823e17ebd5681..709d83a1f57b7faa0ecce1f1f8590c86c1eba1a8 100644
--- a/src/operators/dropout_op.cpp
+++ b/src/operators/dropout_op.cpp
@@ -19,7 +19,7 @@ namespace operators {
 
 template <typename Dtype, typename T>
 void DropoutOp<Dtype, T>::InferShape() const {
-  auto input_dims = thsi->param_.InputX()->dims();
+  auto input_dims = this->param_.InputX()->dims();
   this->param_.Out()->Resize(input_dims);
 }
 template class DropoutOp<CPU, float>;