diff --git a/example/ck_tile/01_fmha/fmha_fwd_runner.hpp b/example/ck_tile/01_fmha/fmha_fwd_runner.hpp
index b6287245a0..1227724d40 100644
--- a/example/ck_tile/01_fmha/fmha_fwd_runner.hpp
+++ b/example/ck_tile/01_fmha/fmha_fwd_runner.hpp
@@ -750,9 +750,21 @@ fwd_result fmha_fwd_run(mode_enum mode,
     }
     else if(qscale.type == quant_scale_enum::blockscale)
     {
-        ck_tile::FillUniformDistribution<float>{0.012f, 0.015f, next_seed()}(q_descale_host);
-        ck_tile::FillUniformDistribution<float>{0.012f, 0.015f, next_seed()}(k_descale_host);
-        ck_tile::FillUniformDistribution<float>{0.012f, 0.015f, next_seed()}(v_descale_host);
+        float q_dtype_max = ck_tile::type_convert<float>(ck_tile::numeric<QDataType>::max());
+        float k_dtype_max = ck_tile::type_convert<float>(ck_tile::numeric<KDataType>::max());
+        float v_dtype_max = ck_tile::type_convert<float>(ck_tile::numeric<VDataType>::max());
+
+        float qkv_max       = 3.f;
+        float max_descale_q = qkv_max / q_dtype_max;
+        float max_descale_k = qkv_max / k_dtype_max;
+        float max_descale_v = qkv_max / v_dtype_max;
+
+        ck_tile::FillUniformDistribution<float>{max_descale_q * 0.8f, max_descale_q, next_seed()}(
+            q_descale_host);
+        ck_tile::FillUniformDistribution<float>{max_descale_k * 0.8f, max_descale_k, next_seed()}(
+            k_descale_host);
+        ck_tile::FillUniformDistribution<float>{max_descale_v * 0.8f, max_descale_v, next_seed()}(
+            v_descale_host);
     }
 
     iota_shuffle(block_table_host.begin(), block_table_host.end(), 0, random_engine);