diff --git a/src/DotRecast.Detour.TileCache/DtTileCache.cs b/src/DotRecast.Detour.TileCache/DtTileCache.cs
index 26acff8..f5c4f15 100644
--- a/src/DotRecast.Detour.TileCache/DtTileCache.cs
+++ b/src/DotRecast.Detour.TileCache/DtTileCache.cs
@@ -385,9 +385,7 @@ namespace DotRecast.Detour.TileCache
 
         private ObstacleRequest AddObstacleRequest(DtTileCacheObstacle ob)
         {
-            ObstacleRequest req = new ObstacleRequest();
-            req.action = ObstacleRequestAction.REQUEST_ADD;
-            req.refs = GetObstacleRef(ob);
+            ObstacleRequest req = new ObstacleRequest(ObstacleRequestAction.REQUEST_ADD, GetObstacleRef(ob));
             m_reqs.Add(req);
             return req;
         }
@@ -399,9 +397,7 @@ namespace DotRecast.Detour.TileCache
                 return;
             }
 
-            ObstacleRequest req = new ObstacleRequest();
-            req.action = ObstacleRequestAction.REQUEST_REMOVE;
-            req.refs = refs;
+            ObstacleRequest req = new ObstacleRequest(ObstacleRequestAction.REQUEST_REMOVE, refs);
             m_reqs.Add(req);
         }
 
diff --git a/src/DotRecast.Detour.TileCache/ObstacleRequest.cs b/src/DotRecast.Detour.TileCache/ObstacleRequest.cs
index 7fffca3..4051370 100644
--- a/src/DotRecast.Detour.TileCache/ObstacleRequest.cs
+++ b/src/DotRecast.Detour.TileCache/ObstacleRequest.cs
@@ -20,9 +20,15 @@ freely, subject to the following restrictions:
 
 namespace DotRecast.Detour.TileCache
 {
-    public class ObstacleRequest
+    public readonly struct ObstacleRequest
     {
-        public ObstacleRequestAction action;
-        public long refs;
+        public readonly ObstacleRequestAction action;
+        public readonly long refs;
+
+        public ObstacleRequest(ObstacleRequestAction action, long refs)
+        {
+            this.action = action;
+            this.refs = refs;
+        }
     }
 }
\ No newline at end of file