diff --git a/src/zm_box.h b/src/zm_box.h
index efc12cb18..ca3e6fd39 100644
--- a/src/zm_box.h
+++ b/src/zm_box.h
@@ -47,10 +47,14 @@ public:
 
   inline const Coord &Lo() const { return lo; }
   inline int LoX() const { return lo.X(); }
+  inline int LoX(int p_lo_x) { return lo.X(p_lo_x); }
   inline int LoY() const { return lo.Y(); }
+  inline int LoY(int p_lo_y) { return lo.Y(p_lo_y); }
   inline const Coord &Hi() const { return hi; }
   inline int HiX() const { return hi.X(); }
+  inline int HiX(int p_hi_x) { return hi.X(p_hi_x); }
   inline int HiY() const { return hi.Y(); }
+  inline int HiY(int p_hi_y) { return hi.Y(p_hi_y); }
   inline const Coord &Size() const { return size; }
   inline int Width() const { return size.X(); }
   inline int Height() const { return size.Y(); }
diff --git a/src/zm_coord.h b/src/zm_coord.h
index c6234fb1c..9ddd4af0c 100644
--- a/src/zm_coord.h
+++ b/src/zm_coord.h
@@ -38,14 +38,14 @@ public:
     y = coord.y;
     return *this;
   }
-  inline int &X() { return( x ); }
-  inline const int &X() const { return( x ); }
-  inline int &Y() { return( y ); }
-  inline const int &Y() const { return( y ); }
+  inline int &X(int p_x) { x=p_x; return x; }
+  inline const int &X() const { return x; }
+  inline int &Y(int p_y) { y=p_y; return y; }
+  inline const int &Y() const { return y; }
 
   inline static Coord Range( const Coord &coord1, const Coord &coord2 ) {
     Coord result( (coord1.x-coord2.x)+1, (coord1.y-coord2.y)+1 );
-    return( result );
+    return result;
   }
 
   inline bool operator==( const Coord &coord ) { return( x == coord.x && y == coord.y ); }
diff --git a/src/zm_poly.h b/src/zm_poly.h
index be039ef3e..d45a13ea2 100644
--- a/src/zm_poly.h
+++ b/src/zm_poly.h
@@ -100,9 +100,13 @@ public:
 
   inline const Box &Extent() const { return extent; }
   inline int LoX() const { return extent.LoX(); }
+  inline int LoX(int p_lo_x) { return extent.LoX(p_lo_x); }
   inline int HiX() const { return extent.HiX(); }
+  inline int HiX(int p_hi_x) { return extent.HiX(p_hi_x); }
   inline int LoY() const { return extent.LoY(); }
+  inline int LoY(int p_lo_y) { return extent.LoY(p_lo_y); }
   inline int HiY() const { return extent.HiY(); }
+  inline int HiY(int p_hi_y) { return extent.HiY(p_hi_y); }
   inline int Width() const { return extent.Width(); }
   inline int Height() const { return extent.Height(); }