diff --git a/cell.cpp b/cell.cpp
index fa893c39..a123c3da 100644
--- a/cell.cpp
+++ b/cell.cpp
@@ -884,8 +884,8 @@ int heptdistance(heptagon *h1, heptagon *h2) {
     if(h1 == h2) return d;
     for(int i=0; i<S7; i++) if(h1->move(i) == h2) return d + 1;
     int d1 = h1->distance, d2 = h2->distance;
-    if(d1 >= d2) d++, h1 = createStep(h1, binarytiling ? 5 : 0);
-    if(d2 >  d1) d++, h2 = createStep(h2, binarytiling ? 5 : 0);
+    if(d1 >= d2) d++, h1 = createStep(h1, binary::updir());
+    if(d2 >  d1) d++, h2 = createStep(h2, binary::updir());
     }
   }
 
diff --git a/hyper.h b/hyper.h
index 41661b2d..e749b0e9 100644
--- a/hyper.h
+++ b/hyper.h
@@ -5645,6 +5645,7 @@ namespace solv {
 bool in_perspective();
 
 extern int noclipped;
-void draw_radar(bool cornermode);
+void draw_radar(bool cornermode); 
+namespace binary { int updir(); }
 
 }
\ No newline at end of file