diff --git a/src/comm.h b/src/comm.h
index 43a30675f3..e2df05a938 100644
--- a/src/comm.h
+++ b/src/comm.h
@@ -63,7 +63,7 @@ class Comm : protected Pointers {
   // methods
 
   Comm(class LAMMPS *);
-  virtual ~Comm();
+  ~Comm() override;
   // NOTE: copy_arrays is called from a constructor and must not be made virtual
   void copy_arrays(class Comm *);
   virtual void init();
diff --git a/src/domain.h b/src/domain.h
index 234bdbb837..a3a526610e 100644
--- a/src/domain.h
+++ b/src/domain.h
@@ -110,7 +110,7 @@ class Domain : protected Pointers {
   RegionCreatorMap *region_map;
 
   Domain(class LAMMPS *);
-  virtual ~Domain();
+  ~Domain() override;
   virtual void init();
   void set_initial_box(int expandflag = 1);
   virtual void set_global_box();
diff --git a/src/input.h b/src/input.h
index faf45ab305..1fe79ba561 100644
--- a/src/input.h
+++ b/src/input.h
@@ -33,7 +33,7 @@ class Input : protected Pointers {
   class Variable *variable;    // defined variables
 
   Input(class LAMMPS *, int, char **);
-  ~Input();
+  ~Input() override;
   void file();                       // process all input
   void file(const char *);           // process an input script
   char *one(const std::string &);    // process a single command
diff --git a/src/pointers.h b/src/pointers.h
index 44820d06eb..5f82872514 100644
--- a/src/pointers.h
+++ b/src/pointers.h
@@ -91,7 +91,7 @@ class Pointers {
     atomKK(ptr->atomKK),
     memoryKK(ptr->memoryKK),
     python(ptr->python) {}
-  virtual ~Pointers() {}
+  virtual ~Pointers() = default;
 
   // remove default members execept for the copy constructor
 
diff --git a/src/region.h b/src/region.h
index 043d3bdd36..83810f5be3 100644
--- a/src/region.h
+++ b/src/region.h
@@ -69,7 +69,7 @@ class Region : protected Pointers {
   int *list;
 
   Region(class LAMMPS *, int, char **);
-  virtual ~Region();
+  ~Region() override;
   virtual void init();
   int dynamic_check();
 
diff --git a/src/update.h b/src/update.h
index b3fd1e4a3d..25af895bf3 100644
--- a/src/update.h
+++ b/src/update.h
@@ -60,7 +60,7 @@ class Update : protected Pointers {
   MinimizeCreatorMap *minimize_map;
 
   Update(class LAMMPS *);
-  ~Update();
+  ~Update() override;
   void init();
   void set_units(const char *);
   void create_integrate(int, char **, int);
diff --git a/src/variable.h b/src/variable.h
index dbad793b57..7b51b45f38 100644
--- a/src/variable.h
+++ b/src/variable.h
@@ -23,7 +23,7 @@ class Variable : protected Pointers {
 
  public:
   Variable(class LAMMPS *);
-  ~Variable();
+  ~Variable() override;
   void set(int, char **);
   void set(const std::string &);
   void set(char *, int, char **);
@@ -152,7 +152,7 @@ class VarReader : protected Pointers {
   char *id_fix;
 
   VarReader(class LAMMPS *, char *, char *, int);
-  ~VarReader();
+  ~VarReader() override;
   int read_scalar(char *);
   int read_peratom();