diff --git a/src/DPD-REACT/random_external_state.h b/src/DPD-REACT/random_external_state.h
index ce06a3c652..b80a0ee904 100644
--- a/src/DPD-REACT/random_external_state.h
+++ b/src/DPD-REACT/random_external_state.h
@@ -111,7 +111,7 @@ int es_rand(es_RNG_t &state_)
 LAMMPS_INLINE
 double es_drand(es_RNG_t &state_)
 {
-  return 1.0 * es_urand64(state_) / MAX_URAND64;
+  return static_cast<double>(es_urand64(state_) / MAX_URAND64);
 }
 
 //Marsaglia polar method for drawing a standard normal distributed random number
diff --git a/src/KOKKOS/compute_orientorder_atom_kokkos.h b/src/KOKKOS/compute_orientorder_atom_kokkos.h
index 259dd1df8a..ef1f874a12 100644
--- a/src/KOKKOS/compute_orientorder_atom_kokkos.h
+++ b/src/KOKKOS/compute_orientorder_atom_kokkos.h
@@ -128,7 +128,7 @@ class ComputeOrientOrderAtomKokkos : public ComputeOrientOrderAtom {
   KOKKOS_INLINE_FUNCTION
   double associated_legendre(int, int, double) const;
 
-  void init_wigner3j();
+  void init_wigner3j() override;
   t_sna_1d d_w3jlist;                     // Wigner coeffs
 };
 
diff --git a/src/KOKKOS/pair_pace_kokkos.h b/src/KOKKOS/pair_pace_kokkos.h
index d9f0b14835..bb476dc8bb 100644
--- a/src/KOKKOS/pair_pace_kokkos.h
+++ b/src/KOKKOS/pair_pace_kokkos.h
@@ -147,7 +147,7 @@ class PairPACEKokkos : public PairPACE {
   void copy_tilde();
   void allocate() override;
   void precompute_harmonics();
-  double memory_usage();
+  double memory_usage() override;
 
   template<int NEIGHFLAG>
   KOKKOS_INLINE_FUNCTION
diff --git a/src/KOKKOS/pppm_kokkos.h b/src/KOKKOS/pppm_kokkos.h
index a6df833a04..701fe5c4d3 100644
--- a/src/KOKKOS/pppm_kokkos.h
+++ b/src/KOKKOS/pppm_kokkos.h
@@ -399,7 +399,7 @@ class PPPMKokkos : public PPPM, public KokkosBaseFFT {
   double boxlo[3];
 
   void set_grid_global() override;
-  void set_grid_local();
+  void set_grid_local() override;
   void adjust_gewald();
   double newton_raphson_f() override;
   double derivf();
@@ -410,7 +410,7 @@ class PPPMKokkos : public PPPM, public KokkosBaseFFT {
   void deallocate() override;
   void deallocate_peratom() override;
   int factorable(int);
-  double compute_df_kspace();
+  double compute_df_kspace() override;
   double estimate_ik_error(double, double, bigint);
   void compute_gf_denom() override;
   void compute_gf_ik() override;