--- 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