diff --git a/paddle/operators/cos_sim_op.cu b/paddle/operators/cos_sim_op.cu
index 42194d7a0576c32a37b4196d82fe0bfbcb3b29ee..86dc04995a27f1086b6592e2881fe4820252c880 100644
--- a/paddle/operators/cos_sim_op.cu
+++ b/paddle/operators/cos_sim_op.cu
@@ -57,8 +57,6 @@ struct CosSimDyFunctor<platform::CUDADeviceContext, T> {
   }
 };
 
-template struct CosSimDyFunctor<platform::CUDADeviceContext, float>;
-
 }  // namespace operators
 }  // namespace paddle
 
diff --git a/paddle/operators/cos_sim_op.h b/paddle/operators/cos_sim_op.h
index a913e576f9702d5eed464be3bdf4cc2ecd56d1fc..7641ca15f144f54a0784a1ab8e1745f1fa4b3d9e 100644
--- a/paddle/operators/cos_sim_op.h
+++ b/paddle/operators/cos_sim_op.h
@@ -56,7 +56,7 @@ struct CosSimFunctor {
         tep_x = x[i];
         tep_y = y_[i];
         xx += tep_x * tep_x;
-        yy += tep_y * tep_y;  // only need
+        yy += tep_y * tep_y;
         xy += tep_x * tep_y;
       }
       xx = sqrt(xx);