diff --git a/config/ompi_fortran_check_ignore_tkr.m4 b/config/ompi_fortran_check_ignore_tkr.m4
index bb64eb50565..d9965376098 100644
--- a/config/ompi_fortran_check_ignore_tkr.m4
+++ b/config/ompi_fortran_check_ignore_tkr.m4
@@ -141,7 +141,7 @@ AC_DEFUN([OMPI_FORTRAN_CHECK_IGNORE_TKR_SUB], [
      end subroutine force_assumed_shape
   end interface
 
-  interface
+  interface foo
      subroutine foo(buffer, count)
        $1 buffer
        $2, intent(in) :: buffer