diff --git a/src/DotRecast.Recast/RecastArea.cs b/src/DotRecast.Recast/RecastArea.cs
index a64663f..8a1235c 100644
--- a/src/DotRecast.Recast/RecastArea.cs
+++ b/src/DotRecast.Recast/RecastArea.cs
@@ -283,7 +283,7 @@ namespace DotRecast.Recast
         /// The value of spacial parameters are in world units.
         ///
         /// @see rcCompactHeightfield, rcMedianFilterWalkableArea
-        public void MarkBoxArea(Telemetry ctx, float[] bmin, float[] bmax, AreaModification areaMod, RcCompactHeightfield chf)
+        public static void MarkBoxArea(Telemetry ctx, float[] bmin, float[] bmax, AreaModification areaMod, RcCompactHeightfield chf)
         {
             ctx.StartTimer("MARK_BOX_AREA");
 
diff --git a/src/DotRecast.Recast/RecastMeshDetail.cs b/src/DotRecast.Recast/RecastMeshDetail.cs
index 774ae51..6f53415 100644
--- a/src/DotRecast.Recast/RecastMeshDetail.cs
+++ b/src/DotRecast.Recast/RecastMeshDetail.cs
@@ -1615,7 +1615,7 @@ namespace DotRecast.Recast
         }
 
         /// @see rcAllocPolyMeshDetail, rcPolyMeshDetail
-        RcPolyMeshDetail MergePolyMeshDetails(Telemetry ctx, RcPolyMeshDetail[] meshes, int nmeshes)
+        private static RcPolyMeshDetail MergePolyMeshDetails(Telemetry ctx, RcPolyMeshDetail[] meshes, int nmeshes)
         {
             RcPolyMeshDetail mesh = new RcPolyMeshDetail();