diff --git a/include/memPool.h b/include/memPool.h
index 1af55d9..569d1e7 100644
--- a/include/memPool.h
+++ b/include/memPool.h
@@ -29,7 +29,9 @@
 #define MEMPOOL_H
 
 #include <vector>
+#if __cplusplus >= 202002L
 #include <bit>
+#endif
 #include <bitset>
 #include <cstdint>