diff -up ./nss/lib/util/pkcs11t.h.tls12_mechs ./nss/lib/util/pkcs11t.h
--- ./nss/lib/util/pkcs11t.h.tls12_mechs	2020-07-21 10:29:05.662324870 +0200
+++ ./nss/lib/util/pkcs11t.h	2020-07-21 10:29:46.368025862 +0200
@@ -992,6 +992,10 @@ typedef CK_ULONG CK_MECHANISM_TYPE;
 
 #define CKM_PBA_SHA1_WITH_SHA1_HMAC 0x000003C0UL
 
+/* 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 mechanisms are new for v2.20 */
 #define CKM_WTLS_PRE_MASTER_KEY_GEN 0x000003D0UL
 #define CKM_WTLS_MASTER_KEY_DERIVE 0x000003D1UL