diff --git a/src/game.rs b/src/game.rs
index e66b1fb..8126cf1 100644
--- a/src/game.rs
+++ b/src/game.rs
@@ -163,7 +163,9 @@ impl Game {
                 }
             } else if segment.starts_with("! ROOM_FORMAT") {
                 let segment = segment.replace("! ROOM_FORMAT ", "");
-                room_format = Some(RoomFormat::from(&segment).unwrap());
+                room_format = Some(
+                    RoomFormat::from(&segment).unwrap_or(RoomFormat::CommaSeparated)
+                );
             } else if segment.starts_with("DEFAULT_FONT") {
                 let segment = segment.replace("DEFAULT_FONT ", "");