diff --git a/include/rpcdce.h b/include/rpcdce.h
index f6b5ab52163..3fd492372c1 100644
--- a/include/rpcdce.h
+++ b/include/rpcdce.h
@@ -139,7 +139,7 @@ typedef I_RPC_HANDLE *RPC_EP_INQ_HANDLE;
 #define RPC_C_AUTHN_MQ 100
 #define RPC_C_AUTHN_DEFAULT 0xffffffff
 
-/* values for RPC_SECURITY_QOS*::ImpersonationLevel */
+/* values for RPC_SECURITY_QOS*::ImpersonationType */
 #define RPC_C_IMP_LEVEL_DEFAULT     0
 #define RPC_C_IMP_LEVEL_ANONYMOUS   1
 #define RPC_C_IMP_LEVEL_IDENTIFY    2