diff --git a/ostd/map.hh b/ostd/map.hh
index a46d393..1e6453c 100644
--- a/ostd/map.hh
+++ b/ostd/map.hh
@@ -166,14 +166,14 @@ namespace detail {
 template<
     typename K, typename T,
     typename H = ToHash<K>,
-    typename C = Equal<K>,
+    typename C = EqualWithCstr<K>,
     typename A = Allocator<Pair<const K, T>>
 > using Map = detail::MapImpl<K, T, H, C, A, false>;
 
 template<
     typename K, typename T,
     typename H = ToHash<K>,
-    typename C = Equal<K>,
+    typename C = EqualWithCstr<K>,
     typename A = Allocator<Pair<const K, T>>
 > using Multimap = detail::MapImpl<K, T, H, C, A, true>;
 
diff --git a/ostd/set.hh b/ostd/set.hh
index 786756e..1bb0f3e 100644
--- a/ostd/set.hh
+++ b/ostd/set.hh
@@ -137,14 +137,14 @@ namespace detail {
 template<
     typename T,
     typename H = ToHash<T>,
-    typename C = Equal<T>,
+    typename C = EqualWithCstr<T>,
     typename A = Allocator<T>
 > using Set = detail::SetImpl<T, H, C, A, false>;
 
 template<
     typename T,
     typename H = ToHash<T>,
-    typename C = Equal<T>,
+    typename C = EqualWithCstr<T>,
     typename A = Allocator<T>
 > using Multiset = detail::SetImpl<T, H, C, A, true>;