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-rw-r--r--dmenu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/dmenu.c b/dmenu.c
index 085dc29..839f6cc 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -415,7 +415,7 @@ keypress(XKeyEvent *ev)
switch(ksym) {
default:
insert:
- if (!iscntrl(*buf))
+ if (!iscntrl((unsigned char)*buf))
insert(buf, len);
break;
case XK_Delete: