1 files changed, 1 insertions, 1 deletions
diff --git a/AvailableColumnsPanel.c b/AvailableColumnsPanel.c
index 70d75807..6865b8bc 100644
--- a/AvailableColumnsPanel.c
+++ b/AvailableColumnsPanel.c
@@ -54,7 +54,7 @@ static HandlerResult AvailableColumnsPanel_eventHandler(Panel* super, int ch) {
       }
       default:
       {
-         if (isalpha(ch))
+         if (ch < 255 && isalpha(ch))
             result = Panel_selectByTyping(super, ch);
          break;
       }