diff --git a/paddle/fluid/operators/expand_op.cc b/paddle/fluid/operators/expand_op.cc
index eef238302217156665ae93397cd4cc0e9410d9e5..40f7c1c54c861abebc84428f55e2769ac8969f0f 100644
--- a/paddle/fluid/operators/expand_op.cc
+++ b/paddle/fluid/operators/expand_op.cc
@@ -117,7 +117,7 @@ class ExpandGradOp : public framework::OperatorWithKernel {
     size_t start_pos = 0u;
     if (!ctx->IsRuntime()) {
       PADDLE_ENFORCE_EQ(
-          x_dims[i], out_dims[i],
+          x_dims[0], out_dims[0],
           "The first dimension size of Input(Out@GRAD) should be "
           "equal to the crroresponding dimension size of Input(X)");
       start_pos = 1u;