diff -ur dynamite-0.1/src/dynamite.c dynamite-0.1a/src/dynamite.c
--- dynamite-0.1/src/dynamite.c	2003-08-22 04:55:42.000000000 -0400
+++ dynamite-0.1a/src/dynamite.c	2004-06-26 21:23:39.474501584 -0400
@@ -1,6 +1,7 @@
 /* $Id: dynamite-0.1-segv.patch,v 1.2 2004/07/07 03:05:39 liquidx Exp $ */
 #include "libdynamite.h"
 #include <stdio.h>
+#include <stdlib.h>
 
 #define FCLOSE(file)    if (file) { fclose(file); file = NULL; }
 
@@ -25,6 +26,11 @@
   int result = -1;
   Cookie cookie;
 
+  if (argc < 3) {
+	printf("Missing filename: dynamite <source> <destination>\n");
+	return 1;
+  }
+
   cookie.input_file   = fopen(argv[1], "r");
   cookie.output_file  = fopen(argv[2], "w");