diff --git a/Assets/AstarPathfindingProject/Generators/RecastGenerator.cs b/Assets/AstarPathfindingProject/Generators/RecastGenerator.cs
index bb0795bb..41611528 100644
--- a/Assets/AstarPathfindingProject/Generators/RecastGenerator.cs
+++ b/Assets/AstarPathfindingProject/Generators/RecastGenerator.cs
@@ -463,7 +463,7 @@ namespace Pathfinding {
            AstarProfiler.EndProfile("UpdateAreaInit");
        }

-       void IUpdatableGraph.UpdateArea (GraphUpdateObject guo) {
+       void IUpdatableGraph.UpdateArea (GraphUpdateObject guo, int threadIndex=0) {
            // Figure out which tiles are affected
            var affectedTiles = GetTouchingTiles(guo.bounds);

@@ -488,7 +488,7 @@ namespace Pathfinding {
            // Build the new tiles
            for (int x = affectedTiles.xmin; x <= affectedTiles.xmax; x++) {
                for (int z = affectedTiles.ymin; z <= affectedTiles.ymax; z++) {
-                   stagingTiles.Add(BuildTileMesh(vox, x, z));
+                   stagingTiles.Add(BuildTileMesh(vox, x, z, threadIndex));
                }
            }