1 files changed, 1 insertions, 1 deletions
diff --git a/ColumnsPanel.c b/ColumnsPanel.c
index 587175c8..318c7af8 100644
--- a/ColumnsPanel.c
+++ b/ColumnsPanel.c
@@ -91,7 +91,7 @@ static HandlerResult ColumnsPanel_eventHandler(Panel* super, int ch) {
       }
       default:
       {
-         if (ch < 255 && isalpha(ch))
+         if (0 < ch && ch < 255 && isalpha((unsigned char)ch))
             result = Panel_selectByTyping(super, ch);
          if (result == BREAK_LOOP)
             result = IGNORED;