diff --git a/Fortran-2003-and-2008-Features.md b/Fortran-2003-and-2008-Features.md
index 3150b1d..eb0a5e5 100644
--- a/Fortran-2003-and-2008-Features.md
+++ b/Fortran-2003-and-2008-Features.md
@@ -19,3 +19,4 @@ In order to compile OpenMC, you must use a compiler which supports the following
   * [ERFC](http://gcc.gnu.org/onlinedocs/gfortran/ERFC.html)
   * [STORAGE_SIZE](http://gcc.gnu.org/onlinedocs/gfortran/STORAGE_005fSIZE.html)
 * ERROR STOP statement
+* NEWUNIT= specifier on OPEN statement