diff --git a/src/sentinel.c b/src/sentinel.c
index c7e7f672..3ff8899d 100644
--- a/src/sentinel.c
+++ b/src/sentinel.c
@@ -1787,7 +1787,7 @@ void rewriteConfigSentinelOption(struct rewriteConfigState *state) {
                 slave_addr = master->addr;
             line = sdscatprintf(sdsempty(),
                 "sentinel known-slave %s %s %d",
-                master->name, ri->addr->ip, ri->addr->port);
+                master->name, slave_addr->ip, slave_addr->port);
             rewriteConfigRewriteLine(state,"sentinel",line,1);
         }
         dictReleaseIterator(di2);