diff --git a/include/ck/utility/get_id.hpp b/include/ck/utility/get_id.hpp
index 77564c6130..fd0d1024b2 100644
--- a/include/ck/utility/get_id.hpp
+++ b/include/ck/utility/get_id.hpp
@@ -9,8 +9,11 @@ namespace ck {
 
 __host__ __device__ constexpr index_t get_warp_size()
 {
-    // warpSize is defined by HIP
-    return warpSize;
+#if defined(__GFX9__) || !defined(__HIP_DEVICE_COMPILE__)
+    return 64;
+#else
+    return 32;
+#endif
 }
 
 __device__ index_t get_thread_local_1d_id() { return threadIdx.x; }
diff --git a/include/ck_tile/core/arch/arch.hpp b/include/ck_tile/core/arch/arch.hpp
index 888f0e728f..73dd19812a 100644
--- a/include/ck_tile/core/arch/arch.hpp
+++ b/include/ck_tile/core/arch/arch.hpp
@@ -31,8 +31,11 @@ enum struct memory_operation_enum
 
 CK_TILE_HOST_DEVICE constexpr index_t get_warp_size()
 {
-    // warpSize is defined by HIP
-    return warpSize;
+#if defined(__GFX9__) || !defined(__HIP_DEVICE_COMPILE__)
+    return 64;
+#else
+    return 32;
+#endif
 }
 
 CK_TILE_DEVICE index_t get_grid_size() { return gridDim.x; }