diff --git a/src/redis.h b/src/redis.h
index 4cf3c51d..2fb03441 100644
--- a/src/redis.h
+++ b/src/redis.h
@@ -120,6 +120,7 @@
 #define REDIS_DEFAULT_AOF_REWRITE_INCREMENTAL_FSYNC 1
 #define REDIS_DEFAULT_MIN_SLAVES_TO_WRITE 0
 #define REDIS_DEFAULT_MIN_SLAVES_MAX_LAG 10
+#define REDIS_IP_STR_LEN INET6_ADDRSTRLEN
 #define REDIS_BINDADDR_MAX 16
 
 /* Protocol and I/O related defines */