diff --git a/include/ck/utility/amd_ck_fp8.hpp b/include/ck/utility/amd_ck_fp8.hpp
index 429ba44b89..5c80c42d6c 100644
--- a/include/ck/utility/amd_ck_fp8.hpp
+++ b/include/ck/utility/amd_ck_fp8.hpp
@@ -243,7 +243,7 @@ __host__ __device__ static inline T cast_from_f8(fp8_storage_t x)
 
 #if CK_FP8_CVT_FAST_PATH
 template <ck_fp8_interpretation_t interpret>
-static __device__ float cast_to_f32_from_f8(fp8_storage_t v)
+static __host__ __device__ float cast_to_f32_from_f8(fp8_storage_t v)
 {
     union
     {
diff --git a/include/ck/utility/data_type.hpp b/include/ck/utility/data_type.hpp
index b25ab5ab5f..a4d96edc6d 100644
--- a/include/ck/utility/data_type.hpp
+++ b/include/ck/utility/data_type.hpp
@@ -2479,7 +2479,11 @@ struct vector_type<T, 64, typename ck::enable_if_t<!is_native_type<T>()>>
     }
 };
 
+#if defined(_WIN32)
+using int64_t = long long;
+#else
 using int64_t = long;
+#endif
 
 // fp64
 using double2_t = typename vector_type<double, 2>::type;