diff --git a/lib/lattice/Lattice_base.h b/lib/lattice/Lattice_base.h
index 2cee54f3..cfa556ff 100644
--- a/lib/lattice/Lattice_base.h
+++ b/lib/lattice/Lattice_base.h
@@ -67,6 +67,7 @@ protected:
   uint64_t _odata_size;    
 public:
   accelerator_inline LatticeAccelerator() : checkerboard(0), _odata(nullptr), _odata_size(0), _grid(nullptr) { }; 
+  accelerator_inline uint64_t oSites(void) const { return _odata_size; };
   accelerator_inline int  Checkerboard(void) const { return checkerboard; };
   accelerator_inline int &Checkerboard(void) { return this->checkerboard; }; // can assign checkerboard on a container, not a view
   accelerator_inline void Conformable(GridBase * &grid) const
diff --git a/lib/qcd/action/fermion/WilsonKernelsAsmBody.h b/lib/qcd/action/fermion/WilsonKernelsAsmBody.h
index bdfe2b96..0cecf42a 100644
--- a/lib/qcd/action/fermion/WilsonKernelsAsmBody.h
+++ b/lib/qcd/action/fermion/WilsonKernelsAsmBody.h
@@ -134,7 +134,7 @@
 
   COMPLEX_SIGNS(isigns);
   MASK_REGS;
-  int nmax=U.Grid()->oSites();
+  int nmax=U.oSites();
   for(int site=0;site<Ns;site++) {
 #ifndef EXTERIOR
     int sU =lo.Reorder(ssU);