diff --git a/src/config.c b/src/config.c
index 05cb7c9f..af5c855c 100644
--- a/src/config.c
+++ b/src/config.c
@@ -628,8 +628,9 @@ void configSetCommand(redisClient *c) {
         zfree(server.masterauth);
         server.masterauth = ((char*)o->ptr)[0] ? zstrdup(o->ptr) : NULL;
     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory")) {
-        if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
-            ll < 0) goto badfmt;
+        int err;
+        ll = memtoll(o->ptr,&err);
+        if (err || ll < 0) goto badfmt;
         server.maxmemory = ll;
         if (server.maxmemory) {
             if (server.maxmemory < zmalloc_used_memory()) {