diff --git a/reg3.cpp b/reg3.cpp
index d296324e..5684ef44 100644
--- a/reg3.cpp
+++ b/reg3.cpp
@@ -70,6 +70,7 @@ void subcellshape::compute_sub() {
   cellcenter = normalize(gres);
   to_cellcenter = rgpushxto0(cellcenter);
   from_cellcenter = gpushxto0(cellcenter);
+  compute_common();
   }
 
 /** \brief regular three-dimensional tessellations */