diff --git a/Doc/lib/liburllib2.tex b/Doc/lib/liburllib2.tex
index 80caa4bb9a0..842b2a31ee6 100644
--- a/Doc/lib/liburllib2.tex
+++ b/Doc/lib/liburllib2.tex
@@ -782,7 +782,8 @@ bytes of it:
 \end{verbatim}
 
 Here we are sending a data-stream to the stdin of a CGI and reading
-the data it returns to us:
+the data it returns to us. Note that this example will only work when the
+Python installation supports SSL.
 
 \begin{verbatim}
 >>> import urllib2