diff --git a/src/config.c b/src/config.c
index 07d402c2..d68176d7 100644
--- a/src/config.c
+++ b/src/config.c
@@ -1599,7 +1599,7 @@ int rewriteConfig(char *path) {
     rewriteConfigYesNoOption(state,"slave-read-only",server.repl_slave_ro,REDIS_DEFAULT_SLAVE_READ_ONLY);
     rewriteConfigNumericalOption(state,"repl-ping-slave-period",server.repl_ping_slave_period,REDIS_REPL_PING_SLAVE_PERIOD);
     rewriteConfigNumericalOption(state,"repl-timeout",server.repl_timeout,REDIS_REPL_TIMEOUT);
-    rewriteConfigNumericalOption(state,"repl-backlog-size",server.repl_backlog_size,REDIS_DEFAULT_REPL_BACKLOG_SIZE);
+    rewriteConfigBytesOption(state,"repl-backlog-size",server.repl_backlog_size,REDIS_DEFAULT_REPL_BACKLOG_SIZE);
     rewriteConfigBytesOption(state,"repl-backlog-ttl",server.repl_backlog_time_limit,REDIS_DEFAULT_REPL_BACKLOG_TIME_LIMIT);
     rewriteConfigYesNoOption(state,"repl-disable-tcp-nodelay",server.repl_disable_tcp_nodelay,REDIS_DEFAULT_REPL_DISABLE_TCP_NODELAY);
     rewriteConfigNumericalOption(state,"slave-priority",server.slave_priority,REDIS_DEFAULT_SLAVE_PRIORITY);