diff -up ./nss/lib/util/pkcs11t.h.tls12_mechs ./nss/lib/util/pkcs11t.h
--- ./nss/lib/util/pkcs11t.h.tls12_mechs	2017-01-13 16:33:12.199107708 +0100
+++ ./nss/lib/util/pkcs11t.h	2017-01-13 16:34:12.479625017 +0100
@@ -1650,6 +1650,10 @@ typedef struct CK_TLS_MAC_PARAMS {
 
 typedef CK_TLS_MAC_PARAMS CK_PTR CK_TLS_MAC_PARAMS_PTR;
 
+/* aliases for compatibility with prior release */
+#define CK_TLS12_MAC_PARAMS CK_TLS_MAC_PARAMS
+#define CK_TLS12_MAC_PARAMS_PTR CK_TLS_MAC_PARAMS_PTR
+
 /* WTLS is new for version 2.20 */
 typedef struct CK_WTLS_RANDOM_DATA {
     CK_BYTE_PTR pClientRandom;