diff --git a/scripts/key_props.gd b/scripts/key_props.gd
index 99bb14b..f82b2bd 100644
--- a/scripts/key_props.gd
+++ b/scripts/key_props.gd
@@ -94,9 +94,14 @@ func chars_from_dict(dict: Dictionary[Char, String], override: bool = true) -> K
 
 
 func chars_to_dict() -> Dictionary[Char, String]:
-	return {
-		Char.MAIN: main_char,
-		Char.SHIFT: shift_char,
-		Char.ALT: alt_char,
-		Char.ALT_SHIFT: alt_shift_char,
-	}
+	var dict: Dictionary[Char, String] = {}
+	if main_char:
+		dict[Char.MAIN] = main_char
+	if shift_char:
+		dict[Char.SHIFT] = shift_char
+	if alt_char:
+		dict[Char.ALT] = alt_char
+	if alt_shift_char:
+		dict[Char.ALT_SHIFT] = alt_shift_char
+
+	return dict