diff --git a/src/binding/fortran/use_mpi_f08/mpi_f08_types.f90 b/src/binding/fortran/use_mpi_f08/mpi_f08_types.f90
index f8b0fa81..46bdf697 100644
--- a/src/binding/fortran/use_mpi_f08/mpi_f08_types.f90
+++ b/src/binding/fortran/use_mpi_f08/mpi_f08_types.f90
@@ -248,10 +248,8 @@ end function MPI_File_c2f
     module procedure MPI_Sizeof_xint64
     module procedure MPI_Sizeof_xreal32
     module procedure MPI_Sizeof_xreal64
-    module procedure MPI_Sizeof_xreal128
     module procedure MPI_Sizeof_xcomplex32
     module procedure MPI_Sizeof_xcomplex64
-    module procedure MPI_Sizeof_xcomplex128
 end interface
 
 private :: MPI_Sizeof_character
@@ -263,10 +261,8 @@ end function MPI_File_c2f
 private :: MPI_Sizeof_xint64
 private :: MPI_Sizeof_xreal32
 private :: MPI_Sizeof_xreal64
-private :: MPI_Sizeof_xreal128
 private :: MPI_Sizeof_xcomplex32
 private :: MPI_Sizeof_xcomplex64
-private :: MPI_Sizeof_xcomplex128
 
 contains
 
@@ -350,16 +346,6 @@ subroutine MPI_Sizeof_xreal64 (x, size, ierror)
     ierror = 0
 end subroutine MPI_Sizeof_xreal64
 
-subroutine MPI_Sizeof_xreal128 (x, size, ierror)
-    use,intrinsic :: iso_fortran_env, only: real128
-    real(real128),dimension(..) :: x
-    integer, intent(out) :: size
-    integer, optional,  intent(out) :: ierror
-
-    size = storage_size(x)/8
-    ierror = 0
-end subroutine MPI_Sizeof_xreal128
-
 subroutine MPI_Sizeof_xcomplex32 (x, size, ierror)
     use,intrinsic :: iso_fortran_env, only: real32
     complex(real32),dimension(..) :: x
@@ -380,16 +366,6 @@ subroutine MPI_Sizeof_xcomplex64 (x, size, ierror)
     ierror = 0
 end subroutine MPI_Sizeof_xcomplex64
 
-subroutine MPI_Sizeof_xcomplex128 (x, size, ierror)
-    use,intrinsic :: iso_fortran_env, only: real128
-    complex(real128),dimension(..) :: x
-    integer, intent(out) :: size
-    integer, optional,  intent(out) :: ierror
-
-    size = storage_size(x)/8
-    ierror = 0
-end subroutine MPI_Sizeof_xcomplex128
-
 subroutine MPI_Status_f2f08(f_status, f08_status, ierror)
     integer, intent(in) :: f_status(MPI_STATUS_SIZE)
     type(MPI_Status), intent(out) :: f08_status