--- smm/vfontas.cpp.orig	2020-07-12 09:44:16 UTC
+++ smm/vfontas.cpp
@@ -15,6 +15,7 @@
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
+#include <errno.h>
 #include <fcntl.h>
 #include <getopt.h>
 #include <unistd.h>