diff --git a/CHANGELOG b/CHANGELOG
index 3806e818..3234cfd9 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,7 +2,8 @@
 
 --- Assimulo-3.5.1 ---
     * Fixed build with sundials 7.x
-    * Added "std=legacy" as default fortran compile flag.
+    * Added "std=legacy" as default fortran compile flag. 
+      This addresses compilation issues commonly experienced with more modern Fortran standards.
 
 --- Assimulo-3.5.0 ---
     * Changed "numpy.float" to equivalent "numpy.float64" due to DeprecationWarnings in numpy >= 1.20.
diff --git a/doc/sphinx/source/changelog.rst b/doc/sphinx/source/changelog.rst
index 7a9c401e..69d0a098 100644
--- a/doc/sphinx/source/changelog.rst
+++ b/doc/sphinx/source/changelog.rst
@@ -5,7 +5,8 @@ Changelog
 
 --- Assimulo-3.5.1 ---
     * Fixed build with sundials 7.x
-    * Added "std=legacy" as default fortran compile flag.
+    * Added "std=legacy" as default fortran compile flag. 
+      This addresses compilation issues commonly experienced with more modern Fortran standards.
 
 --- Assimulo-3.5.0 ---
     * Changed "numpy.float" to equivalent "numpy.float64" due to DeprecationWarnings in numpy >= 1.20.