diff --git a/fortran/src/H5test_kind_SIZEOF.f90 b/fortran/src/H5test_kind_SIZEOF.f90
index ba982ee54d..867ec1e17a 100644
--- a/fortran/src/H5test_kind_SIZEOF.f90
+++ b/fortran/src/H5test_kind_SIZEOF.f90
@@ -15,7 +15,9 @@
 ! NOTES
 !  This program is used in place of H5test_kind.f90 when the Fortran intrinsic
 !  function SIZEOF is available. It generates code that makes use of SIZEOF in
-!  H5fortran_detect.f90 which is a portable solution.
+!  H5fortran_detect.f90 which is a portable solution but is not standard
+!  compliant. The program H5test_kind_C_SIZEOF uses F2008 standard intrinsic
+!  function instead, which is the preferred method. 
 !
 !  The availability of SIZEOF is checked at configure time and the TRUE/FALSE
 !  condition is set in the configure variable "FORTRAN_HAVE_SIZEOF".