diff --git a/parallel_hashmap/phmap.h b/parallel_hashmap/phmap.h
index 9900598..a209016 100644
--- a/parallel_hashmap/phmap.h
+++ b/parallel_hashmap/phmap.h
@@ -2647,15 +2647,7 @@ public:
         std::is_nothrow_default_constructible<key_equal>::value&&
         std::is_nothrow_default_constructible<allocator_type>::value) {}
 
-#if 1
-    explicit parallel_hash_set(size_t bucket_cnt, 
-                               const hasher& hash_param    = hasher(),
-                               const key_equal& eq         = key_equal(),
-                               const allocator_type& alloc = allocator_type()) {
-        for (auto& inner : sets_)
-            inner.set_ = EmbeddedSet(bucket_cnt / N, hash_param, eq, alloc);
-    }
-#else
+#if __cplusplus >= 201703L && (defined(_MSC_VER) || defined(__clang__) || (defined(__GNUC__) && __GNUC__ > 6))
     explicit parallel_hash_set(size_t bucket_cnt, 
                                const hasher& hash_param    = hasher(),
                                const key_equal& eq         = key_equal(),
@@ -2668,6 +2660,14 @@ public:
     parallel_hash_set(typename Inner::Params const &p,
                       phmap::index_sequence<i...>) : sets_{((void)i, p)...}
     {}
+#else
+    explicit parallel_hash_set(size_t bucket_cnt, 
+                               const hasher& hash_param    = hasher(),
+                               const key_equal& eq         = key_equal(),
+                               const allocator_type& alloc = allocator_type()) {
+        for (auto& inner : sets_)
+            inner.set_ = EmbeddedSet(bucket_cnt / N, hash_param, eq, alloc);
+    }
 #endif
 
     parallel_hash_set(size_t bucket_cnt,