diff --git a/src/eap.h b/src/eap.h
index de147834..f64e0f7b 100644
--- a/src/eap.h
+++ b/src/eap.h
@@ -74,6 +74,7 @@ enum eap_type {
 	EAP_TYPE_SIM		= 18,
 	EAP_TYPE_TTLS		= 21,
 	EAP_TYPE_AKA		= 23,
+	EAP_TYPE_AKA_PRIME	= 50,
 	EAP_TYPE_MSCHAPV2	= 26,
 	EAP_TYPE_EXPANDED	= 254,
 };