diff -ur dvi2tty-5.3.1-old/disdvi.c dvi2tty-5.3.1/disdvi.c
--- dvi2tty-5.3.1-old/disdvi.c	2003-01-23 17:31:00.000000000 +0700
+++ dvi2tty-5.3.1/disdvi.c	2004-12-16 18:59:50.930219880 +0700
@@ -108,7 +108,7 @@
  */
 
 #if !defined(THINK_C)
-char *          malloc          ();
+void *          malloc          ();
 #endif
 
 #if defined(VMS)