diff --git a/include/ck_tile/ops/reduce/block/block_reduce.hpp b/include/ck_tile/ops/reduce/block/block_reduce.hpp
index 4284e7622f1..7b5a12bc10d 100644
--- a/include/ck_tile/ops/reduce/block/block_reduce.hpp
+++ b/include/ck_tile/ops/reduce/block/block_reduce.hpp
@@ -394,6 +394,6 @@ struct BlockReduce2D
 
 // deduction guide
 template <typename T>
-CK_TILE_HOST_DEVICE_EXTERN BlockReduce2D(const T&, const typename T::DataType&) -> BlockReduce2D<T>;
+BlockReduce2D(const T&, const typename T::DataType&) -> BlockReduce2D<T>;
 
 } // namespace ck_tile