diff --git a/examples/COUPLE/fortran2/LAMMPS-wrapper.cpp b/examples/COUPLE/fortran2/LAMMPS-wrapper.cpp
index b5b265b4dd..1301bfe348 100644
--- a/examples/COUPLE/fortran2/LAMMPS-wrapper.cpp
+++ b/examples/COUPLE/fortran2/LAMMPS-wrapper.cpp
@@ -23,6 +23,7 @@
 
 #include <mpi.h>
 #include "LAMMPS-wrapper.h"
+#define LAMMPS_LIB_MPI 1
 #include <library.h>
 #include <lammps.h>
 #include <atom.h>
diff --git a/examples/COUPLE/fortran2/Makefile b/examples/COUPLE/fortran2/Makefile
index fe66914892..f8a2126233 100644
--- a/examples/COUPLE/fortran2/Makefile
+++ b/examples/COUPLE/fortran2/Makefile
@@ -14,7 +14,7 @@ CXXLIB = -lstdc++    # replace with your C++ runtime libs
 # Flags for Fortran compiler, C++ compiler, and C preprocessor, respectively
 FFLAGS = -O2 -fPIC
 CXXFLAGS = -O2 -fPIC
-CPPFLAGS = -DOMPI_SKIP_MPICXX=1 -DMPICH_SKIP_MPICXX -DLAMMPS_LIB_MPI
+CPPFLAGS = -DOMPI_SKIP_MPICXX=1 -DMPICH_SKIP_MPICXX
 
 all : liblammps_fortran.a liblammps_fortran.so
 
diff --git a/examples/COUPLE/fortran_dftb/LAMMPS-wrapper.cpp b/examples/COUPLE/fortran_dftb/LAMMPS-wrapper.cpp
index b5b265b4dd..1301bfe348 100644
--- a/examples/COUPLE/fortran_dftb/LAMMPS-wrapper.cpp
+++ b/examples/COUPLE/fortran_dftb/LAMMPS-wrapper.cpp
@@ -23,6 +23,7 @@
 
 #include <mpi.h>
 #include "LAMMPS-wrapper.h"
+#define LAMMPS_LIB_MPI 1
 #include <library.h>
 #include <lammps.h>
 #include <atom.h>