diff --git a/config/main.py b/config/main.py
index 64f437d70e..a4f01555e4 100644
--- a/config/main.py
+++ b/config/main.py
@@ -5830,9 +5830,10 @@ def enable_use_link_local_only(ctx, interface_name):
 
     if (interface_type == "VLAN_INTERFACE"):
         if not clicommon.check_if_vlanid_exist(db, interface_name):
-            ctx.fail("Vlan: {} is invalid. Please create vlan first!!".format(interface_name))
+            ctx.fail("Vlan: {} is invalid. Please create vlan first!!"
+                    .format(interface_name))
         if not clicommon.has_vlan_member(db, interface_name):
-            ctx.fail("Vlan: %s has no member joined. Please make sure at least one vlan member joined the vlan!"
+            ctx.fail("Vlan: {} has no member joined. Please make sure at least one vlan member joined the vlan!"
                     .format(interface_name))
 
     portchannel_member_table = db.get_table('PORTCHANNEL_MEMBER')