diff --git a/src/calibre/ebooks/pdf/render/engine.py b/src/calibre/ebooks/pdf/render/engine.py
index d7e74656d8..b8e7825b9c 100644
--- a/src/calibre/ebooks/pdf/render/engine.py
+++ b/src/calibre/ebooks/pdf/render/engine.py
@@ -243,7 +243,7 @@ class PdfEngine(QPaintEngine):
         try:
             self.pdf = PDFStream(self.file_object, (self.page_width,
                                                     self.page_height),
-                                compress=0 if DEBUG else 1)
+                                compress=not DEBUG)
             self.init_page()
         except:
             traceback.print_exc()
@@ -271,9 +271,11 @@ class PdfEngine(QPaintEngine):
         return QPaintEngine.Pdf
 
     def drawPixmap(self, rect, pixmap, source_rect):
+        print ('drawPixmap() currently unimplemented')
         pass # TODO: Implement me
 
     def drawImage(self, rect, image, source_rect, flags=Qt.AutoColor):
+        print ('drawImage() currently unimplemented')
         pass # TODO: Implement me
 
     def updateState(self, state):
diff --git a/src/calibre/ebooks/pdf/render/serialize.py b/src/calibre/ebooks/pdf/render/serialize.py
index 15443c5131..65bed5ca17 100644
--- a/src/calibre/ebooks/pdf/render/serialize.py
+++ b/src/calibre/ebooks/pdf/render/serialize.py
@@ -133,7 +133,7 @@ class Stream(BytesIO):
 
         d = InlineDictionary({'Length':len(raw), 'DL':dl})
         if filters:
-            d['Filters'] = filters
+            d['Filter'] = filters
         serialize(d, stream)
         stream.write(EOL+b'stream'+EOL)
         stream.write(raw)