diff --git a/parallel_hashmap/btree.h b/parallel_hashmap/btree.h
index 2886094..1e6ea36 100644
--- a/parallel_hashmap/btree.h
+++ b/parallel_hashmap/btree.h
@@ -682,9 +682,9 @@ namespace phmap {
         // Helper functions to do a boolean comparison of two keys given a boolean
         // or three-way comparator.
         // SFINAE prevents implicit conversions to bool (such as from int).
-        template <typename Bool,
-                  phmap::enable_if_t<std::is_same<bool, Bool>::value, int> = 0>
-        constexpr bool compare_result_as_less_than(const Bool r) { return r; }
+        template <typename BoolType,
+                  phmap::enable_if_t<std::is_same<bool, BoolType>::value, int> = 0>
+        constexpr bool compare_result_as_less_than(const BoolType r) { return r; }
         constexpr bool compare_result_as_less_than(const phmap::weak_ordering r) {
             return r < 0;
         }