diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_util.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_util.hpp
index e08bed90ad..0a7a22e5ab 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_util.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_util.hpp
@@ -88,19 +88,18 @@ CK_TILE_DEVICE static void scale_tile_in_scalar(InOutDstrTensor& in_out_dstr_ten
 
     if constexpr(std::is_same_v<std::remove_cv_t<DataType>, float>)
     {
-        auto tmp_scale = type_convert<DataType>(scale);
-
         constexpr index_t thread_buffer_size = InOutDstrTensor::get_thread_buffer_size();
 
         static_for<0, thread_buffer_size, 2>{}([&](auto idx) {
             v_mul_f32_two(in_out_dstr_tensor.thread_buf_[idx],
                           in_out_dstr_tensor.thread_buf_[idx + 1],
-                          tmp_scale);
+                          scale);
         });
     }
     else
     {
-        tile_elementwise_inout([&scale](auto& x) { x = x * scale; }, in_out_dstr_tensor);
+        auto tmp_scale = type_convert<DataType>(scale);
+        tile_elementwise_inout([&tmp_scale](auto& x) { x = x * tmp_scale; }, in_out_dstr_tensor);
     };
 };
 
@@ -128,7 +127,8 @@ CK_TILE_DEVICE static void scale_tile_in_pack(InOutDstrTensor& in_out_dstr_tenso
     }
     else
     {
-        tile_elementwise_inout([&scale](auto& x) { x = x * scale; }, in_out_dstr_tensor);
+        auto tmp_scale = type_convert<DataType>(scale);
+        tile_elementwise_inout([&tmp_scale](auto& x) { x = x * tmp_scale; }, in_out_dstr_tensor);
     };
 };