diff --git a/town_gui.c b/town_gui.c
--- a/town_gui.c
+++ b/town_gui.c
@@ -273,7 +273,7 @@ static void TownViewWndProc(Window *w, W
 		break;
 
 	case WE_ON_EDIT_TEXT: {
-		byte *b = e->edittext.str;
+		const char *b = e->edittext.str;
 		if (*b == 0)
 			return;
 		memcpy(_decode_parameters, b, 32);