diff --git a/src/atom.cpp b/src/atom.cpp
index 0e63fc3fdf..9a2bc75f06 100644
--- a/src/atom.cpp
+++ b/src/atom.cpp
@@ -1910,7 +1910,7 @@ void Atom::add_molecule_atom(Molecule *onemol, int iatom,
     onemol->avec_body->set_quat(ilocal,onemol->quat_external);
   }
 
-  if (molecular != 1) return;
+  if (molecular != Atom::MOLECULAR) return;
 
   // add bond topology info
   // for molecular atom styles, but not atom style template