diff --git a/src/acl.c b/src/acl.c
index 433dd3d3f..b5b9f46a7 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -1402,7 +1402,7 @@ void aclCommand(client *c) {
         }
 
         for (int j = 2; j < c->argc; j++) {
-            sds username = c->argv[j]->ptr;
+            sds username = ptrFromObj(c->argv[j]);
             user *u;
             if (raxRemove(Users,(unsigned char*)username,
                           sdslen(username),