diff --git a/examples/COUPLE/plugin/liblammpsplugin.h b/examples/COUPLE/plugin/liblammpsplugin.h
index 0865be6bb9..26abf74d02 100644
--- a/examples/COUPLE/plugin/liblammpsplugin.h
+++ b/examples/COUPLE/plugin/liblammpsplugin.h
@@ -167,9 +167,9 @@ struct _liblammpsplugin {
   void (*scatter)(void *, char *, int, int, void *);
   void (*scatter_subset)(void *, char *, int, int, int, int *, void *);
 
-// lammps_create_atoms() takes tagint and imageint as args
-// ifdef insures they are compatible with rest of LAMMPS
-// caller must match to how LAMMPS library is built
+/* lammps_create_atoms() takes tagint and imageint as args
+ * the ifdef insures they are compatible with rest of LAMMPS
+ * caller must match to how LAMMPS library is built */
 
 #ifndef LAMMPS_BIGBIG
  void (*create_atoms)(void *, int, int *, int *, double *, double *, int *, int);
diff --git a/examples/COUPLE/plugin/simple.c b/examples/COUPLE/plugin/simple.c
index 0ca5726072..d4b9b9314c 100644
--- a/examples/COUPLE/plugin/simple.c
+++ b/examples/COUPLE/plugin/simple.c
@@ -134,7 +134,7 @@ int main(int narg, char **arg)
     plugin->command(lmp,"run 1");
   }
 
-  // extract force on single atom two different ways
+  /* extract force on single atom two different ways */
 
   if (lammps == 1) {
     double **f = (double **) plugin->extract_atom(lmp,"f");
@@ -172,7 +172,7 @@ int main(int narg, char **arg)
   if (v) free(v);
   if (type) free(type);
 
-  // close down LAMMPS
+  /* close down LAMMPS */
 
   if (lammps == 1) {
     plugin->close(lmp);