diff --git a/llvm/docs/ReleaseNotes.html b/llvm/docs/ReleaseNotes.html
index 430200b4612f517dffb6938e2268f94003879589..4337480d451528da7885e3c92f98e7b313b86fea 100644
--- a/llvm/docs/ReleaseNotes.html
+++ b/llvm/docs/ReleaseNotes.html
@@ -316,6 +316,19 @@ components, please contact us on the llvmdev list.</p>
 
 </div>
 
+<!-- ======================================================================= -->
+<div class="doc_subsection">
+  <a name="build">Known problems with the Build System</a>
+</div>
+
+<div class="doc_text">
+
+<ul>
+  <li>The <a href="http://llvm.org/PR656">configure script sometimes fails on Solaris/Sparc</a>.</li>
+</ul>
+</div>
+
+
 <!-- ======================================================================= -->
 <div class="doc_subsection">
   <a name="core">Known problems with the LLVM Core</a>