Index: libressl-3.1.0/crypto/Makefile.am
===================================================================
--- libressl-3.1.0.orig/crypto/Makefile.am
+++ libressl-3.1.0/crypto/Makefile.am
@@ -723,6 +723,10 @@ libcrypto_la_SOURCES += modes/cts128.c
 libcrypto_la_SOURCES += modes/gcm128.c
 libcrypto_la_SOURCES += modes/ofb128.c
 libcrypto_la_SOURCES += modes/xts128.c
+libcrypto_la_SOURCES += modes/cbc64.c
+libcrypto_la_SOURCES += modes/cfb64.c
+libcrypto_la_SOURCES += modes/ctr64.c
+libcrypto_la_SOURCES += modes/ofb64.c
 noinst_HEADERS += modes/modes_lcl.h
 
 # objects