diff --git a/vmware_nsxlib/v3/nsx_constants.py b/vmware_nsxlib/v3/nsx_constants.py
index 96b301ff..3f32535b 100644
--- a/vmware_nsxlib/v3/nsx_constants.py
+++ b/vmware_nsxlib/v3/nsx_constants.py
@@ -115,7 +115,7 @@ LOGGING = 'logging'
 # Allowed address pairs
 NUM_ALLOWED_IP_ADDRESSES = 128
 NUM_ALLOWED_IP_ADDRESSES_v4 = NUM_ALLOWED_IP_ADDRESSES
-NUM_ALLOWED_IP_ADDRESSES_v6 = 16
+NUM_ALLOWED_IP_ADDRESSES_v6 = 15
 MAX_STATIC_ROUTES = 26
 
 # QoS directions egress/ingress