diff -up autotrace-0.31.1/input-bmp.c.orig autotrace-0.31.1/input-bmp.c

--- autotrace-0.31.1/input-bmp.c.orig	2002-10-10 22:44:08.000000000 +0200

+++ autotrace-0.31.1/input-bmp.c	2013-06-28 10:24:58.336056959 +0200

@@ -166,7 +166,7 @@ input_bmp_reader (at_string filename,

                                                         /* 36 */

       Maps = 4;

     }

-  else if (Bitmap_File_Head.biSize <= 64) /* Probably OS/2 2.x */

+  else if (Bitmap_File_Head.biSize >= 40 && Bitmap_File_Head.biSize <= 64) /* Probably OS/2 2.x */

     {

       if (!ReadOK (fd, buffer, Bitmap_File_Head.biSize - 4))

 	{