diff -Nuar dev86-0.16.19.orig/unproto/tok_io.c dev86-0.16.19/unproto/tok_io.c
--- dev86-0.16.19.orig/unproto/tok_io.c	1997-08-09 16:49:58.000000000 +0200
+++ dev86-0.16.19/unproto/tok_io.c	2014-09-18 09:10:06.244984172 +0200
@@ -189,7 +189,7 @@
 
 /* do_control - parse control line */
 
-static int do_control()
+static void do_control()
 {
     struct token *t;
     int     line;