diff --git a/src/common_define.h b/src/common_define.h
index 0913390..4c96473 100644
--- a/src/common_define.h
+++ b/src/common_define.h
@@ -125,7 +125,8 @@ extern int pthread_mutexattr_settype(pthread_mutexattr_t *attr, int kind);
 #define FC_IOV_BATCH_SIZE  IOV_MAX
 #endif
 
-// 由于要支持IPv6，所以将IP_ADDRESS_SIZE的值由16修改为46
+#define IPV4_ADDRESS_SIZE   INET_ADDRSTRLEN   //16
+#define IPV6_ADDRESS_SIZE   INET6_ADDRSTRLEN  //46
 #define IP_ADDRESS_SIZE     INET6_ADDRSTRLEN  //46
 #define FORMATTED_IP_SIZE   (IP_ADDRESS_SIZE + 2)
 #define INFINITE_FILE_SIZE (256 * 1024LL * 1024 * 1024 * 1024 * 1024LL)