diff --git a/paddle/fluid/operators/beam_search_op.cc b/paddle/fluid/operators/beam_search_op.cc
index bee0a29e9052c30be9752931eb40e222d5c6cc51..b0e284a26032dc06b72ac8aff83f22b8a5f41b08 100644
--- a/paddle/fluid/operators/beam_search_op.cc
+++ b/paddle/fluid/operators/beam_search_op.cc
@@ -318,7 +318,7 @@ class BeamSearchInferShape : public framework::InferShapeBase {
     }
   }
 };
-
+*/
 class BeamSearchInferVarType : public framework::VarTypeInference {
  public:
   void operator()(const framework::OpDesc &op_desc,
@@ -331,7 +331,7 @@ class BeamSearchInferVarType : public framework::VarTypeInference {
     }
   }
 };
-*/
+
 }  // namespace operators
 }  // namespace paddle
 /*
@@ -343,7 +343,8 @@ REGISTER_OPERATOR(beam_search, paddle::operators::BeamSearchOp,
 */
 namespace ops = paddle::operators;
 REGISTER_OP_WITHOUT_GRADIENT(beam_search, ops::BeamSearchOp,
-                             ops::BeamSearchOpMaker);
+                             ops::BeamSearchOpMaker,
+                             ops::BeamSearchInferVarType);
 REGISTER_OP_CPU_KERNEL(
     beam_search,
     ops::BeamSearchOpKernel<paddle::platform::CPUDeviceContext, float>,