diff --git a/src/USER-INTEL/intel_intrinsics.h b/src/USER-INTEL/intel_intrinsics.h
index 44a9605961..56b488aa20 100644
--- a/src/USER-INTEL/intel_intrinsics.h
+++ b/src/USER-INTEL/intel_intrinsics.h
@@ -1,4 +1,4 @@
-/* ----------------------------------------------------------------------
+/* *- c++ -*- -----------------------------------------------------------
    LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
    http://lammps.sandia.gov, Sandia National Laboratories
    Steve Plimpton, sjplimp@sandia.gov
diff --git a/src/USER-INTEL/pair_lj_long_coul_long_intel.h b/src/USER-INTEL/pair_lj_long_coul_long_intel.h
index b8e4e68928..42eef932ec 100644
--- a/src/USER-INTEL/pair_lj_long_coul_long_intel.h
+++ b/src/USER-INTEL/pair_lj_long_coul_long_intel.h
@@ -1,4 +1,4 @@
-/* ----------------------------------------------------------------------
+/* *- c++ -*- -----------------------------------------------------------
    LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
    http://lammps.sandia.gov, Sandia National Laboratories
    Steve Plimpton, sjplimp@sandia.gov
diff --git a/src/USER-INTEL/pppm_intel.h b/src/USER-INTEL/pppm_intel.h
index 89bc3998e0..d48a6b709e 100644
--- a/src/USER-INTEL/pppm_intel.h
+++ b/src/USER-INTEL/pppm_intel.h
@@ -1,4 +1,4 @@
-/* ----------------------------------------------------------------------
+/* *- c++ -*- -----------------------------------------------------------
    LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
    http://lammps.sandia.gov, Sandia National Laboratories
    Steve Plimpton, sjplimp@sandia.gov