diff --git a/src/KOKKOS/pair_reax_c_kokkos.h b/src/KOKKOS/pair_reax_c_kokkos.h
index a6192ed120..8c07ee2a03 100644
--- a/src/KOKKOS/pair_reax_c_kokkos.h
+++ b/src/KOKKOS/pair_reax_c_kokkos.h
@@ -23,7 +23,7 @@ PairStyle(reax/c/kk/host,PairReaxCKokkos<LMPHostType>)
 #ifndef LMP_PAIR_REAXC_KOKKOS_H
 #define LMP_PAIR_REAXC_KOKKOS_H
 
-#include "stdio.h"
+#include <stdio.h>
 #include "pair_kokkos.h"
 #include "pair_reax_c.h"
 #include "neigh_list_kokkos.h"
diff --git a/src/USER-DPD/compute_dpd_atom.cpp b/src/USER-DPD/compute_dpd_atom.cpp
index 10f5d8203f..ffac09c48e 100644
--- a/src/USER-DPD/compute_dpd_atom.cpp
+++ b/src/USER-DPD/compute_dpd_atom.cpp
@@ -15,7 +15,7 @@
    Contributing author: James Larentzos (U.S. Army Research Laboratory)
 ------------------------------------------------------------------------- */
 
-#include "math.h"
+#include <math.h>
 #include <string.h>
 #include <stdlib.h>
 #include "compute_dpd_atom.h"
diff --git a/src/USER-DPD/pair_exp6_rx.cpp b/src/USER-DPD/pair_exp6_rx.cpp
index 697f94ec79..ae941a081c 100644
--- a/src/USER-DPD/pair_exp6_rx.cpp
+++ b/src/USER-DPD/pair_exp6_rx.cpp
@@ -26,7 +26,7 @@
 #include "error.h"
 #include "modify.h"
 #include "fix.h"
-#include "float.h"
+#include <float.h>
 
 using namespace LAMMPS_NS;
 using namespace MathConst;
diff --git a/src/USER-DPD/pair_multi_lucy.cpp b/src/USER-DPD/pair_multi_lucy.cpp
index 501ef2d04c..a063eff195 100644
--- a/src/USER-DPD/pair_multi_lucy.cpp
+++ b/src/USER-DPD/pair_multi_lucy.cpp
@@ -21,7 +21,7 @@
    The Journal of Chemical Physics, 2016, 144, 104501.
 ------------------------------------------------------------------------------------------- */
 
-#include "mpi.h"
+#include <mpi.h>
 #include <math.h>
 #include "math_const.h"
 #include <stdlib.h>
diff --git a/src/USER-DPD/pair_multi_lucy_rx.cpp b/src/USER-DPD/pair_multi_lucy_rx.cpp
index 0a1bb4b10e..de86733725 100644
--- a/src/USER-DPD/pair_multi_lucy_rx.cpp
+++ b/src/USER-DPD/pair_multi_lucy_rx.cpp
@@ -21,7 +21,7 @@
    The Journal of Chemical Physics, 2016, 144, 104501.
 ------------------------------------------------------------------------------------------- */
 
-#include "mpi.h"
+#include <mpi.h>
 #include <math.h>
 #include "math_const.h"
 #include <stdlib.h>
diff --git a/src/USER-DPD/pair_table_rx.cpp b/src/USER-DPD/pair_table_rx.cpp
index d278feaf89..44a9d76022 100644
--- a/src/USER-DPD/pair_table_rx.cpp
+++ b/src/USER-DPD/pair_table_rx.cpp
@@ -15,7 +15,7 @@
    Contributing author: Paul Crozier (SNL)
 ------------------------------------------------------------------------- */
 
-#include "mpi.h"
+#include <mpi.h>
 #include <math.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/src/USER-INTEL/dihedral_charmm_intel.cpp b/src/USER-INTEL/dihedral_charmm_intel.cpp
index 7e93e319d9..c07c226611 100644
--- a/src/USER-INTEL/dihedral_charmm_intel.cpp
+++ b/src/USER-INTEL/dihedral_charmm_intel.cpp
@@ -15,8 +15,8 @@
    Contributing author: W. Michael Brown (Intel)
 ------------------------------------------------------------------------- */
 
-#include "mpi.h"
-#include "math.h"
+#include <mpi.h>
+#include <math.h>
 #include "dihedral_charmm_intel.h"
 #include "atom.h"
 #include "comm.h"
diff --git a/src/USER-INTEL/dihedral_harmonic_intel.cpp b/src/USER-INTEL/dihedral_harmonic_intel.cpp
index aa6ba9d1df..03ab152f49 100644
--- a/src/USER-INTEL/dihedral_harmonic_intel.cpp
+++ b/src/USER-INTEL/dihedral_harmonic_intel.cpp
@@ -15,8 +15,8 @@
    Contributing author: W. Michael Brown (Intel)
 ------------------------------------------------------------------------- */
 
-#include "mpi.h"
-#include "math.h"
+#include <mpi.h>
+#include <math.h>
 #include "dihedral_harmonic_intel.h"
 #include "atom.h"
 #include "comm.h"
diff --git a/src/USER-INTEL/dihedral_opls_intel.cpp b/src/USER-INTEL/dihedral_opls_intel.cpp
index 1edb52f056..bfd5a53956 100644
--- a/src/USER-INTEL/dihedral_opls_intel.cpp
+++ b/src/USER-INTEL/dihedral_opls_intel.cpp
@@ -15,8 +15,8 @@
    Contributing author: W. Michael Brown (Intel)
 ------------------------------------------------------------------------- */
 
-#include "mpi.h"
-#include "math.h"
+#include <mpi.h>
+#include <math.h>
 #include "dihedral_opls_intel.h"
 #include "atom.h"
 #include "comm.h"
diff --git a/src/USER-INTEL/fix_npt_intel.cpp b/src/USER-INTEL/fix_npt_intel.cpp
index 2bfbd5e735..56df3bba4b 100644
--- a/src/USER-INTEL/fix_npt_intel.cpp
+++ b/src/USER-INTEL/fix_npt_intel.cpp
@@ -11,7 +11,7 @@
    See the README file in the top-level LAMMPS directory.
 ------------------------------------------------------------------------- */
 
-#include "string.h"
+#include <string.h>
 #include "fix_npt_intel.h"
 #include "modify.h"
 #include "error.h"
diff --git a/src/USER-INTEL/fix_nve_asphere_intel.cpp b/src/USER-INTEL/fix_nve_asphere_intel.cpp
index f43519663a..6563165454 100644
--- a/src/USER-INTEL/fix_nve_asphere_intel.cpp
+++ b/src/USER-INTEL/fix_nve_asphere_intel.cpp
@@ -15,9 +15,9 @@
    Contributing author: W. Michael Brown (Intel)
 ------------------------------------------------------------------------- */
 
-#include "math.h"
-#include "stdio.h"
-#include "string.h"
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
 #include "fix_nve_asphere_intel.h"
 #include "math_extra_intel.h"
 #include "atom.h"
diff --git a/src/USER-INTEL/pair_buck_coul_cut_intel.cpp b/src/USER-INTEL/pair_buck_coul_cut_intel.cpp
index b9d60d8ead..4f34a484cb 100644
--- a/src/USER-INTEL/pair_buck_coul_cut_intel.cpp
+++ b/src/USER-INTEL/pair_buck_coul_cut_intel.cpp
@@ -15,10 +15,10 @@
    Contributing author: Rodrigo Canales (RWTH Aachen University)
 ------------------------------------------------------------------------- */
 
-#include "math.h"
-#include "stdio.h"
-#include "stdlib.h"
-#include "string.h"
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include "pair_buck_coul_cut_intel.h"
 #include "atom.h"
 #include "comm.h"
diff --git a/src/USER-INTEL/pair_buck_coul_long_intel.cpp b/src/USER-INTEL/pair_buck_coul_long_intel.cpp
index 5450d6ff3b..9319f531e1 100644
--- a/src/USER-INTEL/pair_buck_coul_long_intel.cpp
+++ b/src/USER-INTEL/pair_buck_coul_long_intel.cpp
@@ -15,10 +15,10 @@
    Contributing author: Rodrigo Canales (RWTH Aachen University)
 ------------------------------------------------------------------------- */
 
-#include "math.h"
-#include "stdio.h"
-#include "stdlib.h"
-#include "string.h"
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include "pair_buck_coul_long_intel.h"
 #include "atom.h"
 #include "comm.h"
diff --git a/src/USER-INTEL/pair_buck_intel.cpp b/src/USER-INTEL/pair_buck_intel.cpp
index 5411661c54..4815d1e025 100644
--- a/src/USER-INTEL/pair_buck_intel.cpp
+++ b/src/USER-INTEL/pair_buck_intel.cpp
@@ -15,7 +15,7 @@
    Contributing author: Rodrigo Canales (RWTH Aachen University)
 ------------------------------------------------------------------------- */
 
-#include "math.h"
+#include <math.h>
 #include "pair_buck_intel.h"
 #include "atom.h"
 #include "comm.h"
diff --git a/src/USER-INTEL/pair_tersoff_intel.cpp b/src/USER-INTEL/pair_tersoff_intel.cpp
index 0c07be463f..88354ec4d0 100644
--- a/src/USER-INTEL/pair_tersoff_intel.cpp
+++ b/src/USER-INTEL/pair_tersoff_intel.cpp
@@ -15,10 +15,10 @@
    Contributing author: Markus Höhnerbach (RWTH)
 ------------------------------------------------------------------------- */
 
-#include "math.h"
-#include "stdio.h"
-#include "stdlib.h"
-#include "string.h"
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include "pair_tersoff_intel.h"
 #include "atom.h"
 #include "neighbor.h"
diff --git a/src/USER-MANIFOLD/fix_manifoldforce.cpp b/src/USER-MANIFOLD/fix_manifoldforce.cpp
index da794e4a48..c3bbc935af 100644
--- a/src/USER-MANIFOLD/fix_manifoldforce.cpp
+++ b/src/USER-MANIFOLD/fix_manifoldforce.cpp
@@ -11,9 +11,9 @@
    See the README file in the top-level LAMMPS directory.
 ------------------------------------------------------------------------- */
 
-#include "math.h"
-#include "string.h"
-#include "stdlib.h"
+#include <math.h>
+#include <string.h>
+#include <stdlib.h>
 #include "atom.h"
 #include "update.h"
 #include "respa.h"
diff --git a/src/USER-MANIFOLD/fix_nve_manifold_rattle.cpp b/src/USER-MANIFOLD/fix_nve_manifold_rattle.cpp
index 246f7cc66f..e27762a7d5 100644
--- a/src/USER-MANIFOLD/fix_nve_manifold_rattle.cpp
+++ b/src/USER-MANIFOLD/fix_nve_manifold_rattle.cpp
@@ -32,16 +32,16 @@
 ------------------------------------------------------------------------- */
 
 
-#include "stdio.h"
-#include "stdlib.h"
-#include "string.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include "atom.h"
 #include "force.h"
 #include "update.h"
 #include "respa.h"
 #include "error.h"
 #include "group.h"
-#include "math.h"
+#include <math.h>
 #include "input.h"
 #include "variable.h"
 #include "citeme.h"
diff --git a/src/USER-MANIFOLD/fix_nvt_manifold_rattle.cpp b/src/USER-MANIFOLD/fix_nvt_manifold_rattle.cpp
index b0109d16f7..38e8c6a265 100644
--- a/src/USER-MANIFOLD/fix_nvt_manifold_rattle.cpp
+++ b/src/USER-MANIFOLD/fix_nvt_manifold_rattle.cpp
@@ -32,16 +32,16 @@
 ------------------------------------------------------------------------- */
 
 
-#include "stdio.h"
-#include "stdlib.h"
-#include "string.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include "atom.h"
 #include "force.h"
 #include "update.h"
 #include "respa.h"
 #include "error.h"
 #include "group.h"
-#include "math.h"
+#include <math.h>
 #include "input.h"
 #include "variable.h"
 #include "citeme.h"
diff --git a/src/compute_dipole_chunk.cpp b/src/compute_dipole_chunk.cpp
index 4bdf23e273..74d66e7c1b 100644
--- a/src/compute_dipole_chunk.cpp
+++ b/src/compute_dipole_chunk.cpp
@@ -11,7 +11,7 @@
    See the README file in the top-level LAMMPS directory.
 ------------------------------------------------------------------------- */
 
-#include "string.h"
+#include <string.h>
 #include "compute_dipole_chunk.h"
 #include "atom.h"
 #include "update.h"