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-rw-r--r--generic/tclCmdMZ.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tclCmdMZ.c b/generic/tclCmdMZ.c
index d7394fb..56df0dd 100644
--- a/generic/tclCmdMZ.c
+++ b/generic/tclCmdMZ.c
@@ -1424,7 +1424,7 @@ StringIndexCmd(
*/
if (TclIsPureByteArray(objv[1])) {
- unsigned char uch = (unsigned char) ch;
+ unsigned char uch = UCHAR(ch);
Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(&uch, 1));
} else {