diff --git a/r5dev/thirdparty/recast/Detour/Include/DetourNavMesh.h b/r5dev/thirdparty/recast/Detour/Include/DetourNavMesh.h
index ee4bae81..118f241a 100644
--- a/r5dev/thirdparty/recast/Detour/Include/DetourNavMesh.h
+++ b/r5dev/thirdparty/recast/Detour/Include/DetourNavMesh.h
@@ -103,6 +103,9 @@ enum dtTileFlags
 {
 	/// The navigation mesh owns the tile memory and is responsible for freeing it.
 	DT_TILE_FREE_DATA = 0x01,
+
+	/// The navigation mesh owns the offmesh connection memory and is responsible for freeing it.
+	DT_OFFMESH_FREE_DATA = 0x02,
 };
 
 /// Vertex flags returned by dtNavMeshQuery::findStraightPath.
@@ -326,7 +329,7 @@ struct dtMeshTile
 	int dataSize;							///< Size of the tile data.
 	int flags;								///< Tile flags. (See: #dtTileFlags)
 	dtMeshTile* next;						///< The next free tile, or the next tile in the spatial grid.
-	void* unused;
+	void* unknownVTableInstance; // See [r5apex_ds + F437D9] for usage
 private:
 	dtMeshTile(const dtMeshTile&);
 	dtMeshTile& operator=(const dtMeshTile&);
diff --git a/r5dev/thirdparty/recast/Detour/Source/DetourNavMesh.cpp b/r5dev/thirdparty/recast/Detour/Source/DetourNavMesh.cpp
index dad47b1b..8e359b54 100644
--- a/r5dev/thirdparty/recast/Detour/Source/DetourNavMesh.cpp
+++ b/r5dev/thirdparty/recast/Detour/Source/DetourNavMesh.cpp
@@ -206,7 +206,7 @@ dtNavMesh::dtNavMesh() :
 	m_orig[2] = 0;
 }
 
-dtNavMesh::~dtNavMesh()
+dtNavMesh::~dtNavMesh() // TODO: see [r5apex_ds + F43720] to re-implement this correctly
 {
 	for (int i = 0; i < m_maxTiles; ++i)
 	{
@@ -1021,7 +1021,7 @@ dtStatus dtNavMesh::addTile(unsigned char* data, int dataSize, int flags,
 	tile->data = data;
 	tile->dataSize = dataSize;
 	tile->flags = flags;
-	tile->unused = nullptr;
+	tile->unknownVTableInstance = nullptr;
 
 	connectIntLinks(tile);