diff --git a/binary-tiling.cpp b/binary-tiling.cpp
index f027890a..4a1dfa10 100644
--- a/binary-tiling.cpp
+++ b/binary-tiling.cpp
@@ -505,6 +505,7 @@ namespace binary {
   
   int updir() {
     if(geometry == gBinary4) return 3;
+    if(geometry == gBinaryTiling) return 5;
     if(penrose) return 0;
     return S7-1;
     }