diff --git a/paddle/fluid/lite/kernels/arm/mul_compute_test.cc b/paddle/fluid/lite/kernels/arm/mul_compute_test.cc
index 9d4018084882492f21ba2fb5f835ae8c897e48d8..5e3d17ec93ae9d73028343b3d4dd1e77a0fe86f0 100644
--- a/paddle/fluid/lite/kernels/arm/mul_compute_test.cc
+++ b/paddle/fluid/lite/kernels/arm/mul_compute_test.cc
@@ -73,7 +73,7 @@ TEST(mul_arm, compare_test) {
         FillData<T>(x_data, x.dims().production());
         FillData<T>(y_data, y.dims().production());
         FillData<T>(out_data, out.dims().production(), 0, 0);
-        FillData<T>(ref_data, out.dims().production(), 0, 0);
+        FillData<T>(ref_data, ref.dims().production(), 0, 0);
 
         MulCompute mul;
         operators::MulParam param;