diff --git a/src/calibre/ebooks/oeb/base.py b/src/calibre/ebooks/oeb/base.py
index 7cedfce17d..9f4aa56911 100644
--- a/src/calibre/ebooks/oeb/base.py
+++ b/src/calibre/ebooks/oeb/base.py
@@ -1461,6 +1461,9 @@ class Guide(object):
     def __getitem__(self, key):
         return self.refs[key]
 
+    def get(self, key):
+        return self.refs.get(key)
+
     def __delitem__(self, key):
         del self.refs[key]
 
diff --git a/src/calibre/ebooks/oeb/transforms/flatcss.py b/src/calibre/ebooks/oeb/transforms/flatcss.py
index 3f1b87c48a..4a7e51137e 100644
--- a/src/calibre/ebooks/oeb/transforms/flatcss.py
+++ b/src/calibre/ebooks/oeb/transforms/flatcss.py
@@ -171,8 +171,14 @@ class CSSFlattener(object):
 
     def __call__(self, oeb, context):
         oeb.logger.info('Flattening CSS and remapping font sizes...')
-        self.context = self.opts =context
+        self.context = self.opts = context
         self.oeb = oeb
+        self.items = list(self.oeb.spine)
+        titlepage = self.oeb.guide.get('titlepage')
+        if titlepage is not None:
+            titlepage = titlepage.item
+            if titlepage is not None and titlepage not in self.items:
+                self.items.append(titlepage)
 
         self.filter_css = frozenset()
         if self.opts.filter_css:
@@ -260,7 +266,7 @@ class CSSFlattener(object):
         self.stylizers = {}
         profile = self.context.source
         css = ''
-        for item in self.oeb.spine:
+        for item in self.items:
             html = item.data
             body = html.find(XHTML('body'))
             if 'style' in html.attrib:
@@ -300,7 +306,7 @@ class CSSFlattener(object):
 
     def baseline_spine(self):
         sizes = defaultdict(float)
-        for item in self.oeb.spine:
+        for item in self.items:
             html = item.data
             stylizer = self.stylizers[item]
             body = html.find(XHTML('body'))
@@ -595,7 +601,7 @@ class CSSFlattener(object):
 
     def collect_global_css(self):
         global_css = defaultdict(list)
-        for item in self.oeb.spine:
+        for item in self.items:
             stylizer = self.stylizers[item]
             if float(self.context.margin_top) >= 0:
                 stylizer.page_rule['margin-top'] = '%gpt'%\
@@ -634,7 +640,7 @@ class CSSFlattener(object):
     def flatten_spine(self):
         names = defaultdict(int)
         styles, pseudo_styles = {}, defaultdict(dict)
-        for item in self.oeb.spine:
+        for item in self.items:
             html = item.data
             stylizer = self.stylizers[item]
             if self.specializer is not None:
@@ -657,6 +663,6 @@ class CSSFlattener(object):
 
         href = self.replace_css(css)
         global_css = self.collect_global_css()
-        for item in self.oeb.spine:
+        for item in self.items:
             stylizer = self.stylizers[item]
             self.flatten_head(item, href, global_css[item])