diff -ur bincimap-1.2.13final.orig/src/convert.h bincimap-1.2.13final/src/convert.h
--- bincimap-1.2.13final.orig/src/convert.h	2005-02-08 22:30:22.000000000 +0200
+++ bincimap-1.2.13final/src/convert.h	2009-08-08 10:38:08.000000000 +0300
@@ -111,7 +111,7 @@
       unsigned char c = *i;
       unsigned char d = *(i + 1);
       
-      char *t;
+      const char *t;
       if ((t = strchr(hexchars, c)) == 0)
 	return "out of range";
       n = (t - hexchars) << 4;
