diff --git a/Detour/Include/DetourNavMeshQuery.h b/Detour/Include/DetourNavMeshQuery.h
index 4a5112c..a791b12 100644
--- a/Detour/Include/DetourNavMeshQuery.h
+++ b/Detour/Include/DetourNavMeshQuery.h
@@ -41,6 +41,10 @@ class dtQueryFilter
 public:
 	dtQueryFilter();
 	
+#ifdef DT_VIRTUAL_QUERYFILTER
+	virtual ~dtQueryFilter() { }
+#endif
+	
 	/// Returns true if the polygon can be visited.  (I.e. Is traversable.)
 	///  @param[in]		ref		The reference id of the polygon test.
 	///  @param[in]		tile	The tile containing the polygon.
diff --git a/Recast/Include/Recast.h b/Recast/Include/Recast.h
index b8f8b20..83ca606 100644
--- a/Recast/Include/Recast.h
+++ b/Recast/Include/Recast.h
@@ -338,7 +338,7 @@ struct rcHeightfieldLayer
 	int maxy;					///< The maximum y-bounds of usable data. (Along the z-axis.)
 	int hmin;					///< The minimum height bounds of usable data. (Along the y-axis.)
 	int hmax;					///< The maximum height bounds of usable data. (Along the y-axis.)
-	unsigned char* heights;		///< The heightfield. [Size: (width - borderSize*2) * (h - borderSize*2)]
+	unsigned char* heights;		///< The heightfield. [Size: width * height]
 	unsigned char* areas;		///< Area ids. [Size: Same as #heights]
 	unsigned char* cons;		///< Packed neighbor connection information. [Size: Same as #heights]
 };