diff --git a/src/calibre/manual/Makefile b/src/calibre/manual/Makefile
index dc72b40f3f..c1a2279abf 100644
--- a/src/calibre/manual/Makefile
+++ b/src/calibre/manual/Makefile
@@ -25,7 +25,7 @@ clean:
 
 html:
 	mkdir -p .build/html .build/doctrees
-	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) .build/html
+	$(SPHINXBUILD) -b html -t online $(ALLSPHINXOPTS) .build/html
 	@echo
 	@echo "Build finished. The HTML pages are in .build/html."
 
diff --git a/src/calibre/manual/index.rst b/src/calibre/manual/index.rst
index 81b8ac88f1..d0d6bfb9b5 100755
--- a/src/calibre/manual/index.rst
+++ b/src/calibre/manual/index.rst
@@ -17,7 +17,7 @@ To get started with more advanced usage, you should read about the :ref:`Graphic
 
 .. only:: online
     
-    An ebook version of this user manual is available in `EPUB format <calibre.epub>`_. 
+    **An ebook version of this user manual is available in** `EPUB format <calibre.epub>`_.
     
 Sections
 ------------