diff --git a/doc/index.rst b/doc/index.rst
index 4760219..5ae063e 100755
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -3,6 +3,7 @@
 +++++++++++++++++++++++++++++++++++++++++++++++++
 
 .. |(logo)| image:: ../../../c++boost.gif
+   :alt:
 
 __ ../../../index.htm