diff --git a/llvm/docs/ReleaseNotes.html b/llvm/docs/ReleaseNotes.html
index 9d140e568b0c..4e953f6b2411 100644
--- a/llvm/docs/ReleaseNotes.html
+++ b/llvm/docs/ReleaseNotes.html
@@ -660,6 +660,8 @@ syntax, there are still significant gaps in that support.</p>
    from the previous release.</p>
 
 <ul>
+  <li>LLVM's build system now requires a python 2 interpreter to be present at
+      build time. A perl interpreter is no longer required.</li>
   <li>The C backend has been removed.  It had numerous problems, to the point of
       not being able to compile any nontrivial program.</li>
   <li>The Alpha, Blackfin and SystemZ targets have been removed due to lack of