Index: libressl-3.1.0/crypto/Makefile.am
===================================================================
--- libressl-3.1.0.orig/crypto/Makefile.am
+++ libressl-3.1.0/crypto/Makefile.am
@@ -746,6 +746,7 @@ libcrypto_la_SOURCES += modes/cfb128.c
 libcrypto_la_SOURCES += modes/ctr128.c
 libcrypto_la_SOURCES += modes/cts128.c
 libcrypto_la_SOURCES += modes/gcm128.c
+libcrypto_la_SOURCES += modes/mgm128.c
 libcrypto_la_SOURCES += modes/ofb128.c
 libcrypto_la_SOURCES += modes/xts128.c
 libcrypto_la_SOURCES += modes/cbc64.c