--- Makefile.am.orig	2020-11-08 18:35:24 UTC
+++ Makefile.am
@@ -7,7 +7,7 @@ SET_INCLUDES = -I$(top_srcdir)/src -I$(top_builddir)/s
 
 AM_CFLAGS = -std=c99 $(LIBGCRYPT_CFLAGS) $(GPG_ERROR_CFLAGS)
 AM_CPPFLAGS = $(SET_FEATURES) $(SET_INCLUDES)
-AM_YFLAGS = -d -p libaacs_yy
+AM_YFLAGS = -d -p libaacs_yy -Wno-yacc
 
 lib_LTLIBRARIES = libaacs.la
 libaacs_la_SOURCES=\