diff --git a/CMakeLists.txt b/CMakeLists.txt
index abadd5ea..3144480b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -369,24 +369,27 @@ if(MPI_FOUND)
   file(MAKE_DIRECTORY ${CMAKE_Fortran_MODULE_DIRECTORY})
 
   set(_mpi_mod_found FALSE)
-  foreach(_mod_name mpi.mod MPI.mod)
-    foreach(_inc ${_mpi_fortran_inc})
-      if(EXISTS "${_inc}/${_mod_name}")
-        file(COPY "${_inc}/${_mod_name}" DESTINATION "${CMAKE_Fortran_MODULE_DIRECTORY}")
-        message(STATUS "Copied ${_mod_name} from ${_inc}")
-        set(_mpi_mod_found TRUE)
+  if(_mpi_fortran_inc)
+    foreach(_mod_name mpi.mod MPI.mod)
+      foreach(_inc ${_mpi_fortran_inc})
+        if(EXISTS "${_inc}/${_mod_name}")
+          file(COPY "${_inc}/${_mod_name}" DESTINATION "${CMAKE_Fortran_MODULE_DIRECTORY}")
+          message(STATUS "Copied ${_mod_name} from ${_inc}")
+          set(_mpi_mod_found TRUE)
+          break()
+        endif()
+      endforeach()
+      if(_mpi_mod_found)
         break()
       endif()
     endforeach()
-    if(_mpi_mod_found)
-      break()
-    endif()
-  endforeach()
+  endif()
 
   if(NOT _mpi_mod_found)
-    message(WARNING "mpi.mod not found in MPI include paths; assuming mpifort provides it internally.")
+    message(WARNING "mpi.mod not found in MPI include paths; assuming mpifort provides it internally. Skipping copy.")
   endif()
 
+
   # ------------------------------------------------------------
   # Enable MPI Fortran module support
   # ------------------------------------------------------------