--- bitmaps/ical.xbm.orig	1996-01-24 00:43:16 UTC
+++ bitmaps/ical.xbm
@@ -1,6 +1,6 @@
 #define ical_width 64
 #define ical_height 54
-static char ical_bits[] = {
+static unsigned char ical_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x30, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x68, 0x00,