update ipv3-encap protocol name
diff --git a/openstack/networking/v2/extensions/security/rules/requests.go b/openstack/networking/v2/extensions/security/rules/requests.go
index 1327197..83120c4 100644
--- a/openstack/networking/v2/extensions/security/rules/requests.go
+++ b/openstack/networking/v2/extensions/security/rules/requests.go
@@ -57,7 +57,7 @@
ProtocolEGP RuleProtocol = "egp"
ProtocolGRE RuleProtocol = "gre"
ProtocolIGMP RuleProtocol = "igmp"
- ProtocolIPv6 RuleProtocol = "ipv6-encap"
+ ProtocolIPv6Encap RuleProtocol = "ipv6-encap"
ProtocolIPv6Frag RuleProtocol = "ipv6-frag"
ProtocolIPv6ICMP RuleProtocol = "ipv6-icmp"
ProtocolIPv6NoNxt RuleProtocol = "ipv6-nonxt"