--- parse.c	2007-04-18 12:22:24 +0400

+++ parse.c.new	2007-04-18 12:24:53 +0400

@@ -2128,7 +2128,7 @@

                 dup2(fids[1], 1);       /* stdout = pipe to parent */

                 /* get_defs("m4", dpy, display_name) */

                 tmp_file = m4_defs(dpy, display_name);

-                execlp("m4", "m4",

+                execlp(M4PROG, M4PROGNAME,

 #if !defined(__NetBSD__)

 			"-s",

 #endif