diff --git a/modules/mol/base/src/coord_group.cc b/modules/mol/base/src/coord_group.cc
index 856ad696791087760328d3be5e3ef06af3ca48ab..3ab9ec3dbf7077bf88c56a62aa582984833e0a70 100644
--- a/modules/mol/base/src/coord_group.cc
+++ b/modules/mol/base/src/coord_group.cc
@@ -146,7 +146,8 @@ void CoordGroupHandle::AddFrames(const CoordGroupHandle& cg)
       throw IntegrityError("Atom number don't match");
     }
     for (size_t i=0; i<cg.GetFrameCount(); ++i) {
-      source_->AddFrame(*cg.GetFrame(i));
+      CoordFramePtr p = cg.GetFrame(i);
+      source_->AddFrame(*p,p->GetCellSize(),p->GetCellAngles());
     }
   } else {
     throw IntegrityError("Can't add frame to immutable CoordGroup");