diff --git a/src/CG-DNA/atom_vec_oxdna.h b/src/CG-DNA/atom_vec_oxdna.h
index 338c1adca3..7830aeaf33 100644
--- a/src/CG-DNA/atom_vec_oxdna.h
+++ b/src/CG-DNA/atom_vec_oxdna.h
@@ -27,7 +27,6 @@ namespace LAMMPS_NS {
 class AtomVecOxdna : public AtomVec {
  public:
   AtomVecOxdna(class LAMMPS *);
-  ~AtomVecOxdna() override = default;
 
   void grow_pointers() override;
   void data_atom_post(int) override;
diff --git a/src/KOKKOS/atom_vec_angle_kokkos.h b/src/KOKKOS/atom_vec_angle_kokkos.h
index c5cd639cf5..8a315d666c 100644
--- a/src/KOKKOS/atom_vec_angle_kokkos.h
+++ b/src/KOKKOS/atom_vec_angle_kokkos.h
@@ -30,7 +30,7 @@ namespace LAMMPS_NS {
 class AtomVecAngleKokkos : public AtomVecKokkos {
  public:
   AtomVecAngleKokkos(class LAMMPS *);
-  ~AtomVecAngleKokkos() override = default;
+
   void grow(int) override;
   void copy(int, int, int) override;
   int pack_comm(int, int *, double *, int, int *) override;
diff --git a/src/KOKKOS/atom_vec_atomic_kokkos.h b/src/KOKKOS/atom_vec_atomic_kokkos.h
index d14e9e6c85..e0134f8952 100644
--- a/src/KOKKOS/atom_vec_atomic_kokkos.h
+++ b/src/KOKKOS/atom_vec_atomic_kokkos.h
@@ -31,7 +31,7 @@ namespace LAMMPS_NS {
 class AtomVecAtomicKokkos : public AtomVecKokkos {
  public:
   AtomVecAtomicKokkos(class LAMMPS *);
-  ~AtomVecAtomicKokkos() override = default;
+
   void grow(int) override;
   void copy(int, int, int) override;
   int pack_border(int, int *, double *, int, int *) override;
diff --git a/src/KOKKOS/atom_vec_bond_kokkos.h b/src/KOKKOS/atom_vec_bond_kokkos.h
index e8522887a1..3daef1dbbe 100644
--- a/src/KOKKOS/atom_vec_bond_kokkos.h
+++ b/src/KOKKOS/atom_vec_bond_kokkos.h
@@ -30,7 +30,7 @@ namespace LAMMPS_NS {
 class AtomVecBondKokkos : public AtomVecKokkos {
  public:
   AtomVecBondKokkos(class LAMMPS *);
-  ~AtomVecBondKokkos() override = default;
+
   void grow(int) override;
   void copy(int, int, int) override;
   int pack_border(int, int *, double *, int, int *) override;
diff --git a/src/KOKKOS/atom_vec_charge_kokkos.h b/src/KOKKOS/atom_vec_charge_kokkos.h
index 438f3106a7..c2d85e4bd6 100644
--- a/src/KOKKOS/atom_vec_charge_kokkos.h
+++ b/src/KOKKOS/atom_vec_charge_kokkos.h
@@ -31,7 +31,7 @@ namespace LAMMPS_NS {
 class AtomVecChargeKokkos : public AtomVecKokkos {
  public:
   AtomVecChargeKokkos(class LAMMPS *);
-  ~AtomVecChargeKokkos() override = default;
+
   void grow(int) override;
   void copy(int, int, int) override;
   int pack_border(int, int *, double *, int, int *) override;
diff --git a/src/KOKKOS/atom_vec_dpd_kokkos.h b/src/KOKKOS/atom_vec_dpd_kokkos.h
index 79d8c5a59f..4dfa2bfbe0 100644
--- a/src/KOKKOS/atom_vec_dpd_kokkos.h
+++ b/src/KOKKOS/atom_vec_dpd_kokkos.h
@@ -31,7 +31,7 @@ namespace LAMMPS_NS {
 class AtomVecDPDKokkos : public AtomVecKokkos {
  public:
   AtomVecDPDKokkos(class LAMMPS *);
-  ~AtomVecDPDKokkos() override = default;
+
   void grow(int) override;
   void copy(int, int, int) override;
   int pack_comm(int, int *, double *, int, int *) override;
diff --git a/src/KOKKOS/atom_vec_full_kokkos.h b/src/KOKKOS/atom_vec_full_kokkos.h
index 95e35ef85f..54671e47e3 100644
--- a/src/KOKKOS/atom_vec_full_kokkos.h
+++ b/src/KOKKOS/atom_vec_full_kokkos.h
@@ -30,7 +30,7 @@ namespace LAMMPS_NS {
 class AtomVecFullKokkos : public AtomVecKokkos {
  public:
   AtomVecFullKokkos(class LAMMPS *);
-  ~AtomVecFullKokkos() override = default;
+
   void grow(int) override;
   void copy(int, int, int) override;
   int pack_border(int, int *, double *, int, int *) override;
diff --git a/src/KOKKOS/atom_vec_kokkos.h b/src/KOKKOS/atom_vec_kokkos.h
index 4b91740cb9..53a1b7ec30 100644
--- a/src/KOKKOS/atom_vec_kokkos.h
+++ b/src/KOKKOS/atom_vec_kokkos.h
@@ -36,7 +36,7 @@ union d_ubuf {
 class AtomVecKokkos : public AtomVec {
  public:
   AtomVecKokkos(class LAMMPS *);
-  ~AtomVecKokkos() override = default;
+
   bigint roundup(bigint) override;
   int pack_comm(int, int *, double *, int, int *) override;
   int pack_comm_vel(int, int *, double *, int, int *) override;
diff --git a/src/KOKKOS/atom_vec_molecular_kokkos.h b/src/KOKKOS/atom_vec_molecular_kokkos.h
index 435d004a71..82ad490abc 100644
--- a/src/KOKKOS/atom_vec_molecular_kokkos.h
+++ b/src/KOKKOS/atom_vec_molecular_kokkos.h
@@ -30,7 +30,7 @@ namespace LAMMPS_NS {
 class AtomVecMolecularKokkos : public AtomVecKokkos {
  public:
   AtomVecMolecularKokkos(class LAMMPS *);
-  ~AtomVecMolecularKokkos() override = default;
+
   void grow(int) override;
   void copy(int, int, int) override;
   int pack_comm(int, int *, double *, int, int *) override;
diff --git a/src/KOKKOS/atom_vec_sphere_kokkos.h b/src/KOKKOS/atom_vec_sphere_kokkos.h
index 107e21005b..26664484dc 100644
--- a/src/KOKKOS/atom_vec_sphere_kokkos.h
+++ b/src/KOKKOS/atom_vec_sphere_kokkos.h
@@ -31,7 +31,7 @@ namespace LAMMPS_NS {
 class AtomVecSphereKokkos : public AtomVecKokkos {
  public:
   AtomVecSphereKokkos(class LAMMPS *);
-  ~AtomVecSphereKokkos() override = default;
+
   void init() override;
   void grow(int) override;
   void grow_pointers() override;
diff --git a/src/KOKKOS/verlet_kokkos.h b/src/KOKKOS/verlet_kokkos.h
index 95c58e2c6b..5159ef00ef 100644
--- a/src/KOKKOS/verlet_kokkos.h
+++ b/src/KOKKOS/verlet_kokkos.h
@@ -31,7 +31,7 @@ namespace LAMMPS_NS {
 class VerletKokkos : public Verlet {
  public:
   VerletKokkos(class LAMMPS *, int, char **);
-  ~VerletKokkos() override = default;
+
   void setup(int) override;
   void setup_minimal(int) override;
   void run(int) override;
diff --git a/src/OPENMP/respa_omp.h b/src/OPENMP/respa_omp.h
index a4fc9561a9..5e6af71102 100644
--- a/src/OPENMP/respa_omp.h
+++ b/src/OPENMP/respa_omp.h
@@ -28,7 +28,7 @@ namespace LAMMPS_NS {
 class RespaOMP : public Respa, public ThrOMP {
  public:
   RespaOMP(class LAMMPS *, int, char **);
-  ~RespaOMP() override = default;
+
   void init() override;
   void setup(int) override;
   void setup_minimal(int) override;
diff --git a/src/atom_vec_atomic.h b/src/atom_vec_atomic.h
index 4ce56ff873..28d773a30a 100644
--- a/src/atom_vec_atomic.h
+++ b/src/atom_vec_atomic.h
@@ -27,7 +27,6 @@ namespace LAMMPS_NS {
 class AtomVecAtomic : public AtomVec {
  public:
   AtomVecAtomic(class LAMMPS *);
-  ~AtomVecAtomic() override = default;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/group.h b/src/group.h
index 8d4270bbad..8c4d10a24f 100644
--- a/src/group.h
+++ b/src/group.h
@@ -29,7 +29,7 @@ class Group : protected Pointers {
   int *dynamic;        // 1 if dynamic, 0 if not
 
   Group(class LAMMPS *);
-  ~Group();
+  ~Group() override;
   void assign(int, char **);                  // assign atoms to a group
   void assign(const std::string &);           // convenience function
   void create(const std::string &, int *);    // add flagged atoms to a group
diff --git a/src/min_fire.h b/src/min_fire.h
index 0119972734..c415ec8fb9 100644
--- a/src/min_fire.h
+++ b/src/min_fire.h
@@ -27,7 +27,7 @@ namespace LAMMPS_NS {
 class MinFire : public Min {
  public:
   MinFire(class LAMMPS *);
-  ~MinFire() override = default;
+
   void init() override;
   void setup_style() override;
   void reset_vectors() override;
diff --git a/src/min_fire_old.h b/src/min_fire_old.h
index f32d66907d..0d9d7ee2ec 100644
--- a/src/min_fire_old.h
+++ b/src/min_fire_old.h
@@ -27,7 +27,7 @@ namespace LAMMPS_NS {
 class MinFireOld : public Min {
  public:
   MinFireOld(class LAMMPS *);
-  ~MinFireOld() override = default;
+
   void init() override;
   void setup_style() override;
   void reset_vectors() override;
diff --git a/src/min_quickmin.h b/src/min_quickmin.h
index 8a199fb472..d1b415313b 100644
--- a/src/min_quickmin.h
+++ b/src/min_quickmin.h
@@ -27,7 +27,7 @@ namespace LAMMPS_NS {
 class MinQuickMin : public Min {
  public:
   MinQuickMin(class LAMMPS *);
-  ~MinQuickMin() override = default;
+
   void init() override;
   void setup_style() override;
   void reset_vectors() override;
diff --git a/src/timer.h b/src/timer.h
index 245a81d660..1cd7b1ce05 100644
--- a/src/timer.h
+++ b/src/timer.h
@@ -44,7 +44,7 @@ class Timer : protected Pointers {
   enum tlevel { OFF = 0, LOOP, NORMAL, FULL };
 
   Timer(class LAMMPS *);
-  ~Timer() override = default;
+
   void init();
 
   // inline function to reduce overhead if we want no detailed timings
diff --git a/src/verlet.h b/src/verlet.h
index 26fb038ce6..e93f5917de 100644
--- a/src/verlet.h
+++ b/src/verlet.h
@@ -27,7 +27,7 @@ namespace LAMMPS_NS {
 class Verlet : public Integrate {
  public:
   Verlet(class LAMMPS *, int, char **);
-  ~Verlet() override = default;
+
   void init() override;
   void setup(int flag) override;
   void setup_minimal(int) override;