diff --git a/src/cmd/tcs/utf.c b/src/cmd/tcs/utf.c
index 8845759..d3fa939 100644
--- a/src/cmd/tcs/utf.c
+++ b/src/cmd/tcs/utf.c
@@ -247,7 +247,7 @@
 	 *	000A0-000FF => A0; A0-FF
 	 */
 	if(c < Rune21) {
-		str[0] = Char1;
+		str[0] = (char)Char1;
 		str[1] = c;
 		return 2;
 	}