diff --git a/spacy/pipeline.pyx b/spacy/pipeline.pyx
index 5bb4b090e..7c1976dfa 100644
--- a/spacy/pipeline.pyx
+++ b/spacy/pipeline.pyx
@@ -69,6 +69,7 @@ class SentenceSegmenter(object):
 
     def __call__(self, doc):
         doc.user_hooks['sents'] = self.strategy
+        return doc
 
     @staticmethod
     def split_on_punct(doc):