diff --git a/src/sentinel.c b/src/sentinel.c
index 8e78a226335cc237dae23164b7f3471cc3a91bed..e363c6c36cf7ffbc5ba9b78b86d9c7a5bab44dda 100644
--- a/src/sentinel.c
+++ b/src/sentinel.c
@@ -922,6 +922,7 @@ sentinelRedisInstance *createSentinelRedisInstance(char *name, int flags, char *
     else if (flags & SRI_SENTINEL) table = master->sentinels;
     sdsname = sdsnew(name);
     if (dictFind(table,sdsname)) {
+        releaseSentinelAddr(addr);
         sdsfree(sdsname);
         errno = EBUSY;
         return NULL;