diff --git a/plugins/module_utils/network/nxos/facts/vlans/vlans.py b/plugins/module_utils/network/nxos/facts/vlans/vlans.py
index 91ce9a2cc..f7ac798f1 100644
--- a/plugins/module_utils/network/nxos/facts/vlans/vlans.py
+++ b/plugins/module_utils/network/nxos/facts/vlans/vlans.py
@@ -166,7 +166,7 @@ def normalize_table_data(self, structured, run_cfg_output):
             #   "vlanshowinfo-vlanmode": "ce-vlan"}}
             mtuinfo = structured["TABLE_mtuinfo"]["ROW_mtuinfo"]
 
-        if isinstance(vlanbrief, list):
+        if not isinstance(vlanbrief, list):
             # vlanbrief is not a list when only one vlan is found.
             vlanbrief = [vlanbrief]
             mtuinfo = [mtuinfo]