diff --git a/paddle/phi/kernels/cpu/activation_grad_kernel.cc b/paddle/phi/kernels/cpu/activation_grad_kernel.cc
index b23aebff6550a4..de604336a33f85 100644
--- a/paddle/phi/kernels/cpu/activation_grad_kernel.cc
+++ b/paddle/phi/kernels/cpu/activation_grad_kernel.cc
@@ -316,8 +316,8 @@ PD_REGISTER_ACTIVATION_DOUBLE_GRAD_KERNEL_WITH_COMPLEX(tanh_double_grad,
 PD_REGISTER_ACTIVATION_DOUBLE_GRAD_KERNEL(leaky_relu_double_grad,
                                           LeakyReluDoubleGradKernel)
 PD_REGISTER_ACTIVATION_DOUBLE_GRAD_KERNEL(elu_double_grad, EluDoubleGradKernel)
-PD_REGISTER_ACTIVATION_DOUBLE_GRAD_KERNEL_WITH_COMPLEX(sqrt_double_grad,
-                                                       SqrtDoubleGradKernel)
+PD_REGISTER_ACTIVATION_DOUBLE_GRAD_KERNEL(sqrt_double_grad,
+                                          SqrtDoubleGradKernel)
 PD_REGISTER_ACTIVATION_DOUBLE_GRAD_KERNEL(rsqrt_double_grad,
                                           RsqrtDoubleGradKernel)
 PD_REGISTER_ACTIVATION_DOUBLE_GRAD_KERNEL(softplus_double_grad,
diff --git a/paddle/phi/kernels/funcs/activation_functor.h b/paddle/phi/kernels/funcs/activation_functor.h
index 975efc7304cc2c..533ada14f678db 100644
--- a/paddle/phi/kernels/funcs/activation_functor.h
+++ b/paddle/phi/kernels/funcs/activation_functor.h
@@ -2628,6 +2628,7 @@ struct SwishGradFunctor : public BaseActivationFunctor<T> {
   static constexpr ActBwdOpFwdDeps FwdDeps() { return ActBwdOpFwdDeps::kDepX; }
 };
 
+// FIXME(qijun) https://github.com/PaddlePaddle/Paddle/issues/5198
 template <typename T>
 struct PowFunctor : public BaseActivationFunctor<T> {
   float factor;
diff --git a/paddle/phi/kernels/gpu/activation_grad_kernel.cu b/paddle/phi/kernels/gpu/activation_grad_kernel.cu
index 66f26988adbb0f..0706411ab5d6b0 100644
--- a/paddle/phi/kernels/gpu/activation_grad_kernel.cu
+++ b/paddle/phi/kernels/gpu/activation_grad_kernel.cu
@@ -385,8 +385,7 @@ PD_REGISTER_ACTIVATION_GRAD_KERNEL(softplus_grad, SoftplusGradKernel)
 PD_REGISTER_ACTIVATION_GRAD_KERNEL(softplus_double_grad,
                                    SoftplusDoubleGradKernel)
 PD_REGISTER_ACTIVATION_GRAD_KERNEL_WITH_COMPLEX(sqrt_grad, SqrtGradKernel)
-PD_REGISTER_ACTIVATION_GRAD_KERNEL_WITH_COMPLEX(sqrt_double_grad,
-                                                SqrtDoubleGradKernel)
+PD_REGISTER_ACTIVATION_GRAD_KERNEL(sqrt_double_grad, SqrtDoubleGradKernel)
 PD_REGISTER_ACTIVATION_GRAD_KERNEL(rsqrt_grad, RsqrtGradKernel)
 PD_REGISTER_ACTIVATION_GRAD_KERNEL(rsqrt_double_grad, RsqrtDoubleGradKernel)