diff --git a/geometry2.cpp b/geometry2.cpp
index ac22a4c6..f9f5e27d 100644
--- a/geometry2.cpp
+++ b/geometry2.cpp
@@ -321,7 +321,7 @@ void virtualRebase_cell(cell*& base, T& at, const U& check) {
 template<class T, class U> 
 void virtualRebase(cell*& base, T& at, const U& check) {
 
-  if(nil && WDIM == 3) {
+  if(nil && WDIM == 3 && nilv::nil_structure_index != 2) {
     hyperpoint h = check(at);
     auto step = [&] (int i) {
       at = currentmap->adj(base, (i+S7/2) % S7) * at;