diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 84b01d8c..75e31fe4 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -14,8 +14,8 @@ Entries are in reverse chronological order (most recent first).
 
 ### Changes
 
-* Added support for HDF5 compact storage. See [Github #213](https://github.com/Unidata/netcdf-fortran/issues/207).
-* Added support for creating netCDF/HDF5 files with szip compression with new functions nf90_def_var_szip() and nf_def_var_szip(). See [Github #213](https://github.com/Unidata/netcdf-fortran/issues/213).
+* Added support for HDF5 compact storage in F77 API. See [Github #213](https://github.com/Unidata/netcdf-fortran/issues/207).
+* Added support for creating netCDF/HDF5 files with szip compression with new functions nf90_def_var_szip() and nf_def_var_szip(). See [Github #213](https://github.com/Unidata/netcdf-fortran/issues/213), [Github #251](https://github.com/Unidata/netcdf-fortran/issues/251).
 * Corrected an issue where parallel netCDF-Fortran builds would fail despite the presense of MPI libraries/compiler/infrastructure. See [Github #208](https://github.com/Unidata/netcdf-fortran/issues/208) for more information.
 
 ## 4.5.2 - September 18, 2019