Index: include/allegro/platform/alunixac.hin
--- include/allegro/platform/alunixac.hin.orig
+++ include/allegro/platform/alunixac.hin
@@ -73,6 +73,9 @@
 /* Define if constructor attribute is supported. */
 #undef ALLEGRO_USE_CONSTRUCTOR
 
+/* Define if SNDIO DIGI driver is supported. */
+#undef ALLEGRO_WITH_SNDIODIGI
+
 /* Define if you need to use a magic main. */
 #undef ALLEGRO_WITH_MAGIC_MAIN
 
