diff --git a/release_docs/RELEASE.txt b/release_docs/RELEASE.txt
index 94f3b75213..9d6cf3612b 100644
--- a/release_docs/RELEASE.txt
+++ b/release_docs/RELEASE.txt
@@ -124,10 +124,13 @@ New Features
     - CMake option to use AEC (open source SZip) library instead of SZip
 
       The open source AEC library is a replacement library for SZip. In
-      order to use it for hdf5 the libaec CMake source was changed to add
-      "-fPIC" and exclude test files. Autotools does not build the
-      compression libraries within hdf5 builds. New option USE_LIBAEC is
-      required to compensate for the different files produced by AEC build.
+      order to use it for hdf5, the libaec CMake source was changed to add
+      "-fPIC" and exclude test files. A new option USE_LIBAEC is required
+      to compensate for the different files produced by AEC build.
+
+      Autotools does not build the compression libraries within hdf5 builds, 
+      but will use an installed libaec when configured as before with the 
+      option --with-libsz=<path to libaec directory>.
 
       (ADB - 2020/04/22, OESS-65)