diff --git a/crates/controller/src/map/mod.rs b/crates/controller/src/map/mod.rs
index a3e9b9d3..01caf7b4 100644
--- a/crates/controller/src/map/mod.rs
+++ b/crates/controller/src/map/mod.rs
@@ -17,6 +17,7 @@ pub struct Map {
   pub height: u32,
   pub players: Vec<MapPlayer>,
   pub forces: Vec<MapForce>,
+  #[serde(default)]
   pub twelve_p: bool,
 }