diff --git a/server/src/zone.rs b/server/src/zone.rs
index 3d432cac..59c5ac93 100644
--- a/server/src/zone.rs
+++ b/server/src/zone.rs
@@ -139,6 +139,10 @@ pub fn zone_update(zone: &Zone, tx: &mut Transaction) -> Result<(), Error> {
 pub fn zone_join(params: ZoneJoinParams, tx: &mut Transaction, account: &Account) -> Result<Game, Error> {
     let mut zone = zone_get(tx, params.zone_id)?;
 
+    if !node_joinable(&zone.graph, NodeIndex::from(params.node_id)) {
+        return Err(err_msg("not not joinable"));
+    }
+
     let mut game = game_pve_new(params.cryp_ids, PveMode::Normal, tx, account)?;
     game.set_zone(zone.id, params.node_id);
 
@@ -159,7 +163,7 @@ pub fn zone_join(params: ZoneJoinParams, tx: &mut Transaction, account: &Account
     return Ok(game);
 }
 
-pub fn zone_close(params: ZoneCloseParams, tx: &mut Transaction, account: &Account) -> Result<(), Error> {
+pub fn zone_close(params: ZoneCloseParams, tx: &mut Transaction, _account: &Account) -> Result<(), Error> {
     let mut zone = zone_get(tx, params.zone_id)?;
     zone.active = false;
     zone_update(&zone, tx)?;
@@ -191,7 +195,7 @@ pub fn create_zone_graph() -> ZoneGraph {
     return gr;
 }
 
-pub fn node_joinable(graph: &mut ZoneGraph, target_index: NodeIndex) -> bool {
+pub fn node_joinable(graph: &ZoneGraph, target_index: NodeIndex) -> bool {
     // early return for already attempted
     {
         let target_encounter = match graph.node_weight(target_index) {
@@ -199,8 +203,6 @@ pub fn node_joinable(graph: &mut ZoneGraph, target_index: NodeIndex) -> bool {
             None => panic!("{:?} has no weight for {:?}", graph, target_index),
         };
 
-        println!("{:?}", target_encounter);
-
         if target_encounter.game_id.is_some() {
             return false;
         }
@@ -216,8 +218,6 @@ pub fn node_joinable(graph: &mut ZoneGraph, target_index: NodeIndex) -> bool {
         }
     });
 
-    println!("{:?}", filtered);
-
     // if a node is a neighbour of that graph
     // and hasn't been attempted
     // it is joinable
@@ -248,8 +248,8 @@ mod tests {
 
     #[test]
     fn zone_joinable_test() {
-        let mut graph = create_zone_graph();
-        assert!(node_joinable(&mut graph, NodeIndex::from(1)));
-        assert!(!node_joinable(&mut graph, NodeIndex::from(2)));
+        let graph = create_zone_graph();
+        assert!(node_joinable(&graph, NodeIndex::from(1)));
+        assert!(!node_joinable(&graph, NodeIndex::from(2)));
     }
 }