diff --git a/example/ck_tile/18_hstu_attention/hstu_attention_pipeline_problem.hpp b/example/ck_tile/18_hstu_attention/hstu_attention_pipeline_problem.hpp
index ac09975aa5..886bb29c1c 100644
--- a/example/ck_tile/18_hstu_attention/hstu_attention_pipeline_problem.hpp
+++ b/example/ck_tile/18_hstu_attention/hstu_attention_pipeline_problem.hpp
@@ -60,10 +60,11 @@ struct HstuAttentionFwdPipelineProblem
     {
         if constexpr(std::is_same_v<DataType, half_t> || std::is_same_v<DataType, bf16_t>)
         {
+            // ToDo: need support in ck_tile for using buffer_load_dwordx3
+            // if constexpr(ElemPerThread % 6 == 0)
+            //    return 6;
             if constexpr(ElemPerThread % 8 == 0)
                 return 8;
-            else if constexpr(ElemPerThread % 6 == 0)
-                return 6;
             else if constexpr(ElemPerThread % 4 == 0)
                 return 4;
             else if constexpr(ElemPerThread % 2 == 0)
@@ -72,10 +73,11 @@ struct HstuAttentionFwdPipelineProblem
         }
         else if constexpr(std::is_same_v<DataType, float>)
         {
+            // ToDo: need support in ck_tile for using buffer_load_dwordx3
+            // if constexpr(ElemPerThread % 3 == 0)
+            //    return 3;
             if constexpr(ElemPerThread % 4 == 0)
                 return 4;
-            else if constexpr(ElemPerThread % 3 == 0)
-                return 3;
             else if constexpr(ElemPerThread % 2 == 0)
                 return 2;
             return 1;