diff --git a/extensions/dict_Gx/dict_Gx.c b/extensions/dict_Gx/dict_Gx.c
index ed623b1..682a119 100644
--- a/extensions/dict_Gx/dict_Gx.c
+++ b/extensions/dict_Gx/dict_Gx.c
@@ -198,6 +198,7 @@
 			{ { .avp_vendor = 0, .avp_name = "Destination-Realm"}, RULE_REQUIRED, -1, -1 },
 			{ { .avp_vendor = 0, .avp_name = "CC-Request-Type"}, RULE_REQUIRED, -1, -1 },
 			{ { .avp_vendor = 0, .avp_name = "CC-Request-Number"}, RULE_REQUIRED, -1, -1 },
+			{ { .avp_vendor = 0, .avp_name = "Service-Context-Id"}, RULE_OPTIONAL, -1, -1 },
 			{ { .avp_vendor = 10415, .avp_name = "Credit-Management-Status"}, RULE_OPTIONAL, -1, -1 },
 			{ { .avp_vendor = 0, .avp_name = "Destination-Host"}, RULE_OPTIONAL, -1, -1 },
 			{ { .avp_vendor = 0, .avp_name = "Origin-State-Id"}, RULE_OPTIONAL, -1, -1 },