diff --git a/DetourTileCache/Source/DetourTileCache.cpp b/DetourTileCache/Source/DetourTileCache.cpp
index 3a213a9..8933f69 100644
--- a/DetourTileCache/Source/DetourTileCache.cpp
+++ b/DetourTileCache/Source/DetourTileCache.cpp
@@ -663,10 +663,13 @@ dtStatus dtTileCache::buildNavMeshTile(const dtCompressedTileRef ref, dtNavMesh*
 	int navDataSize = 0;
 	if (!dtCreateNavMeshData(&params, &navData, &navDataSize))
 		return DT_FAILURE;
-	
+
+	// Remove existing tile.
+	navmesh->removeTile(navmesh->getTileRefAt(tile->header->tx,tile->header->ty,tile->header->tlayer),0,0);
+
+	// Add new tile, or leave the location empty.
 	if (navData)
 	{
-		navmesh->removeTile(navmesh->getTileRefAt(tile->header->tx,tile->header->ty,tile->header->tlayer),0,0);
 		// Let the navmesh own the data.
 		status = navmesh->addTile(navData,navDataSize,DT_TILE_FREE_DATA,0,0);
 		if (dtStatusFailed(status))