diff --git a/src/DotRecast.Detour.TileCache/TileCacheBuilder.cs b/src/DotRecast.Detour.TileCache/TileCacheBuilder.cs
index c31a2c0..11de14b 100644
--- a/src/DotRecast.Detour.TileCache/TileCacheBuilder.cs
+++ b/src/DotRecast.Detour.TileCache/TileCacheBuilder.cs
@@ -1492,7 +1492,7 @@ namespace DotRecast.Detour.TileCache
             }
 
             // Remove vertex.
-            for (int i = rem; i < mesh.nverts; ++i)
+            for (int i = rem; i < mesh.nverts - 1; ++i)
             {
                 mesh.verts[i * 3 + 0] = mesh.verts[(i + 1) * 3 + 0];
                 mesh.verts[i * 3 + 1] = mesh.verts[(i + 1) * 3 + 1];