diff --git a/src/BPM/atom_vec_bpm_sphere.cpp b/src/BPM/atom_vec_bpm_sphere.cpp
index 9428d5e9e4..d3070383e5 100644
--- a/src/BPM/atom_vec_bpm_sphere.cpp
+++ b/src/BPM/atom_vec_bpm_sphere.cpp
@@ -32,6 +32,7 @@ AtomVecBPMSphere::AtomVecBPMSphere(LAMMPS *_lmp) : AtomVec(_lmp)
   mass_type = PER_ATOM;
   molecular = Atom::MOLECULAR;
   bonds_allow = 1;
+  radvary = 0;
 
   atom->molecule_flag = 1;
   atom->sphere_flag = 1;
diff --git a/src/atom_vec_sphere.cpp b/src/atom_vec_sphere.cpp
index 5599ef4370..5a98d78abc 100644
--- a/src/atom_vec_sphere.cpp
+++ b/src/atom_vec_sphere.cpp
@@ -30,6 +30,7 @@ AtomVecSphere::AtomVecSphere(LAMMPS *lmp) : AtomVec(lmp)
 {
   mass_type = PER_ATOM;
   molecular = Atom::ATOMIC;
+  radvary = 0;
 
   atom->sphere_flag = 1;
   atom->radius_flag = atom->rmass_flag = atom->omega_flag = atom->torque_flag = 1;