diff --git a/vcg/space/index/grid_static_ptr.h b/vcg/space/index/grid_static_ptr.h
index 33d44339..1b1518a7 100644
--- a/vcg/space/index/grid_static_ptr.h
+++ b/vcg/space/index/grid_static_ptr.h
@@ -520,7 +520,7 @@ namespace vcg {
 
 		template <class OBJPOINTDISTFUNCTOR, class OBJMARKER>
 			ObjPtr  GetClosest(OBJPOINTDISTFUNCTOR & _getPointDistance, OBJMARKER & _marker, 
-			const CoordType & _p, const ScalarType & _maxDist,ScalarType & _minDist, CoordType & _closestPt)
+				const typename OBJPOINTDISTFUNCTOR::QueryType & _p, const ScalarType & _maxDist,ScalarType & _minDist, CoordType & _closestPt)
 		{
 			return (vcg::GridClosest<GridPtrType,OBJPOINTDISTFUNCTOR,OBJMARKER>(*this,_getPointDistance,_marker, _p,_maxDist,_minDist,_closestPt));
 		}