diff --git a/src/ChangeLog b/src/ChangeLog
index ced62995245..ec8c316de6f 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,7 @@
+2000-08-16  Eli Zaretskii  <eliz@is.elta.co.il>
+
+	* msdos.c (IT_write_glyphs): Convert cbp to unsigned char *.
+
 2000-08-16  Kenichi Handa  <handa@etl.go.jp>
 
 	The following changes are mainly to fix bugs of
diff --git a/src/msdos.c b/src/msdos.c
index 180e8a42683..a1113cc4d4c 100644
--- a/src/msdos.c
+++ b/src/msdos.c
@@ -1056,7 +1056,7 @@ IT_write_glyphs (struct glyph *str, int str_len)
 		 terminal_coding with Vdos_unsupported_char_glyph.  */
 	      if (*conversion_buffer == '?')
 		{
-		  char *cbp = conversion_buffer;
+		  unsigned char *cbp = conversion_buffer;
 
 		  while (cbp < conversion_buffer + enclen && *cbp == '?')
 		    *cbp++ = unsupported_char;