diff --git a/paddle/fluid/operators/concat_op.cc b/paddle/fluid/operators/concat_op.cc
index 7f249924f5b9a1092af725f2f9271ac3cdbd26f3..e52d280836e0236bea8ce871116da5d14f4d6bd6 100644
--- a/paddle/fluid/operators/concat_op.cc
+++ b/paddle/fluid/operators/concat_op.cc
@@ -31,7 +31,7 @@ class ConcatOp : public framework::OperatorWithKernel {
 
   void InferShape(framework::InferShapeContext *ctx) const override {
     PADDLE_ENFORCE_GE(ctx->Inputs("X").size(), 1UL,
-                      "Inputs(X) of ConcatOp should be empty.");
+                      "Inputs(X) of ConcatOp should not be empty.");
     PADDLE_ENFORCE(ctx->HasOutput("Out"),
                    "Output(Out) of ConcatOp should not be null.");