diff --git a/src/sentinel.c b/src/sentinel.c
index 7faf7a2efb..662909d4ab 100644
--- a/src/sentinel.c
+++ b/src/sentinel.c
@@ -3767,7 +3767,7 @@ NULL
             addReplySds(c,e);
         }
     } else if (!strcasecmp(c->argv[1]->ptr,"set")) {
-        if (c->argc < 3) goto numargserr;
+        if (c->argc <= 3) goto numargserr;
         sentinelSetCommand(c);
     } else if (!strcasecmp(c->argv[1]->ptr,"config")) {
         if (c->argc < 3) goto numargserr;