diff --git a/paddle/fluid/operators/merge_lod_tensor_op.cc b/paddle/fluid/operators/merge_lod_tensor_op.cc
index da7fa1b81d601f4dd03d6716de601a4b1abc7fa0..5edc233f6f73262c3d1b803aae0089f5b15d403d 100644
--- a/paddle/fluid/operators/merge_lod_tensor_op.cc
+++ b/paddle/fluid/operators/merge_lod_tensor_op.cc
@@ -164,7 +164,9 @@ class MergeLoDTensorInferShape : public framework::InferShapeBase {
 
     auto mask_dim = context->GetInputDim("Mask");
     PADDLE_ENFORCE_EQ(mask_dim.size(), 2);
-    PADDLE_ENFORCE_EQ(mask_dim[1], 1);
+    if (context->IsRuntime() || mask_dim[1] > 0) {
+      PADDLE_ENFORCE_EQ(mask_dim[1], 1);
+    }
 
     context->SetOutputDim("Out", context->GetInputDim("InTrue"));
   }