diff --git a/src/lammps.cpp b/src/lammps.cpp
index 5e9fed61b7..cc32578f22 100644
--- a/src/lammps.cpp
+++ b/src/lammps.cpp
@@ -527,7 +527,7 @@ LAMMPS::LAMMPS(int narg, char **arg, MPI_Comm communicator) :
      // warn against using I/O redirection in parallel runs
       if ((inflag == 0) && (universe->nprocs > 1))
         error->warning(FLERR, "Using I/O redirection is unreliable with parallel runs. "
-                       "Better use -in switch to read input file.");
+                       "Better to use the -in switch to read input files.");
       utils::flush_buffers(this);
     }