diff --git a/include/ck_tile/core/numeric/pk_int4.hpp b/include/ck_tile/core/numeric/pk_int4.hpp
index f0a681cb17..47297b1ef2 100644
--- a/include/ck_tile/core/numeric/pk_int4.hpp
+++ b/include/ck_tile/core/numeric/pk_int4.hpp
@@ -180,7 +180,7 @@ CK_TILE_HOST_DEVICE bf16x2_t pk_int4_t_to_bfloat16x2_t(const pk_int4_t& x)
 
 CK_TILE_HOST_DEVICE bf16x2_t pk_int4_t_to_bfloat16x2_t(const pk_int4_t& x, float scale)
 {
-    auto float_vec2 = pk_int4_t_to_fp32x2_t(x);
+    auto float_vec2 = pk_int4_t_to_fp32x2_t_signed_conversion(x);
     float_vec2.x = float_vec2.x * scale;
     float_vec2.y = float_vec2.y * scale;
     return bf16x2_t{type_convert<bf16_t>(float_vec2.x), type_convert<bf16_t>(float_vec2.y)};