diff --git a/include/cuco/bloom_filter_ref.cuh b/include/cuco/bloom_filter_ref.cuh
index a4b0cb06f..2c8102a4e 100644
--- a/include/cuco/bloom_filter_ref.cuh
+++ b/include/cuco/bloom_filter_ref.cuh
@@ -97,26 +97,26 @@ class bloom_filter_ref
     //     pattern[i] |= word_type{1} << (hash_value & bit_index_mask);
     //     hash_value >>= bit_index_width;
     //   }
-  }
-
-  return pattern;
-}
 
-private : uint32_t pattern_bits_;
-Hash hash_;
-storage_ref_type storage_ref_;
-
-// Mixins need to be friends with this class in order to access private members
-template <class Op, class Ref>
-friend class detail::operator_impl;
+    return pattern;
+  }
 
-// Refs with other operator sets need to be friends too
-template <class Key_,
-          cuda::thread_scope Scope_,
-          class Hash_,
-          class StorageRef_,
-          class... Operators_>
-friend class bloom_filter_ref;
+ private:
+  uint32_t pattern_bits_;
+  Hash hash_;
+  storage_ref_type storage_ref_;
+
+  // Mixins need to be friends with this class in order to access private members
+  template <class Op, class Ref>
+  friend class detail::operator_impl;
+
+  // Refs with other operator sets need to be friends too
+  template <class Key_,
+            cuda::thread_scope Scope_,
+            class Hash_,
+            class StorageRef_,
+            class... Operators_>
+  friend class bloom_filter_ref;
 };
 
 namespace detail {
diff --git a/include/cuco/operator.hpp b/include/cuco/operator.hpp
index e735cc533..984a9f78b 100644
--- a/include/cuco/operator.hpp
+++ b/include/cuco/operator.hpp
@@ -80,16 +80,6 @@ struct for_each_tag {
 struct add_tag {
 } inline constexpr add;  ///< `cuco::add` operator
 
-namespace reduce {
-
-/**
- * @brief `sum` reduction operator tag
- */
-struct sum_tag {
-} inline constexpr sum;
-
-}  // namespace reduce
-
 }  // namespace op
 }  // namespace cuco