diff --git a/netbox/ipam/utils.py b/netbox/ipam/utils.py
index 8fe40592e..790ac6503 100644
--- a/netbox/ipam/utils.py
+++ b/netbox/ipam/utils.py
@@ -164,7 +164,7 @@ def available_vlans_from_range(vlans, vlan_group, vid_range):
         prev_vid = vlan.vid
 
     # Annotate any remaining available VLANs
-    if prev_vid < max_vid:
+    if prev_vid < max_vid - 1:
         new_vlans.append({
             'vid': prev_vid + 1,
             'vlan_group': vlan_group,