diff --git a/src/min.h b/src/min.h
index 61af3e23b3..82e14910d7 100644
--- a/src/min.h
+++ b/src/min.h
@@ -29,7 +29,7 @@ class Min : protected Pointers {
   int searchflag;    // 0 if damped dynamics, 1 if sub-cycles on local search
 
   Min(class LAMMPS *);
-  virtual ~Min();
+  ~Min() override;
   virtual void init();
   virtual void setup(int flag = 1);
   virtual void setup_minimal(int);
diff --git a/src/min_cg.h b/src/min_cg.h
index 9b50068509..f203c0fbd6 100644
--- a/src/min_cg.h
+++ b/src/min_cg.h
@@ -27,7 +27,7 @@ namespace LAMMPS_NS {
 class MinCG : public MinLineSearch {
  public:
   MinCG(class LAMMPS *);
-  int iterate(int);
+  int iterate(int) override;
 };
 
 }    // namespace LAMMPS_NS
diff --git a/src/min_fire.h b/src/min_fire.h
index 7e961b766a..0119972734 100644
--- a/src/min_fire.h
+++ b/src/min_fire.h
@@ -27,11 +27,11 @@ namespace LAMMPS_NS {
 class MinFire : public Min {
  public:
   MinFire(class LAMMPS *);
-  ~MinFire() {}
-  void init();
-  void setup_style();
-  void reset_vectors();
-  int iterate(int);
+  ~MinFire() override = default;
+  void init() override;
+  void setup_style() override;
+  void reset_vectors() override;
+  int iterate(int) override;
 
  private:
   double dt, dtmax, dtmin;
diff --git a/src/min_fire_old.h b/src/min_fire_old.h
index 06fe13daec..f32d66907d 100644
--- a/src/min_fire_old.h
+++ b/src/min_fire_old.h
@@ -27,11 +27,11 @@ namespace LAMMPS_NS {
 class MinFireOld : public Min {
  public:
   MinFireOld(class LAMMPS *);
-  ~MinFireOld() {}
-  void init();
-  void setup_style();
-  void reset_vectors();
-  int iterate(int);
+  ~MinFireOld() override = default;
+  void init() override;
+  void setup_style() override;
+  void reset_vectors() override;
+  int iterate(int) override;
 
  private:
   double dt, dtmax;
diff --git a/src/min_hftn.h b/src/min_hftn.h
index 4b909c3112..360f52a03d 100644
--- a/src/min_hftn.h
+++ b/src/min_hftn.h
@@ -27,11 +27,11 @@ namespace LAMMPS_NS {
 class MinHFTN : public Min {
  public:
   MinHFTN(LAMMPS *);
-  ~MinHFTN();
-  void init();
-  void setup_style();
-  void reset_vectors();
-  int iterate(int);
+  ~MinHFTN() override;
+  void init() override;
+  void setup_style() override;
+  void reset_vectors() override;
+  int iterate(int) override;
 
  private:
   //---- THE ALGORITHM NEEDS TO STORE THIS MANY ATOM-BASED VECTORS,
diff --git a/src/min_linesearch.h b/src/min_linesearch.h
index 505de7494e..ff8a24fab0 100644
--- a/src/min_linesearch.h
+++ b/src/min_linesearch.h
@@ -21,10 +21,10 @@ namespace LAMMPS_NS {
 class MinLineSearch : public Min {
  public:
   MinLineSearch(class LAMMPS *);
-  ~MinLineSearch();
-  void init();
-  void setup_style();
-  void reset_vectors();
+  ~MinLineSearch() override;
+  void init() override;
+  void setup_style() override;
+  void reset_vectors() override;
 
  protected:
   // vectors needed by linesearch minimizers
diff --git a/src/min_quickmin.h b/src/min_quickmin.h
index 89022aa95b..8a199fb472 100644
--- a/src/min_quickmin.h
+++ b/src/min_quickmin.h
@@ -27,11 +27,11 @@ namespace LAMMPS_NS {
 class MinQuickMin : public Min {
  public:
   MinQuickMin(class LAMMPS *);
-  ~MinQuickMin() {}
-  void init();
-  void setup_style();
-  void reset_vectors();
-  int iterate(int);
+  ~MinQuickMin() override = default;
+  void init() override;
+  void setup_style() override;
+  void reset_vectors() override;
+  int iterate(int) override;
 
  private:
   double dt;
diff --git a/src/min_sd.h b/src/min_sd.h
index 2ccc1ba698..39d2c5f529 100644
--- a/src/min_sd.h
+++ b/src/min_sd.h
@@ -27,7 +27,7 @@ namespace LAMMPS_NS {
 class MinSD : public MinLineSearch {
  public:
   MinSD(class LAMMPS *);
-  int iterate(int);
+  int iterate(int) override;
 };
 
 }    // namespace LAMMPS_NS