diff --git a/mace/ops/conv_pool_2d_base.h b/mace/ops/conv_pool_2d_base.h
index 96b544d7bdeb52e4a70146873009fee5b0656fdb..9b1838a36c2ef4f68217616569edcee32d3a6f9e 100644
--- a/mace/ops/conv_pool_2d_base.h
+++ b/mace/ops/conv_pool_2d_base.h
@@ -18,7 +18,7 @@ class ConvPool2dOpBase : public Operator<D, T> {
         strides_(OperatorBase::GetRepeatedArgument<int>("strides")),
         padding_(static_cast<Padding>(OperatorBase::GetSingleArgument<int>(
             "padding", static_cast<int>(SAME)))),
-        dilations_(OperatorBase::GetRepeatedArgument<int>("dilations")) {}
+        dilations_(OperatorBase::GetRepeatedArgument<int>("dilations", {1, 1})) {}
 
   void CalOutputSize(const index_t *input_shape,   // NCHW
                      const index_t *filter_shape,  // OIHW