diff --git a/spacy/morphology.pyx b/spacy/morphology.pyx
index aa308fd22..3414eec5f 100644
--- a/spacy/morphology.pyx
+++ b/spacy/morphology.pyx
@@ -109,8 +109,8 @@ cdef class Morphology:
             analysis.lemma = self.lemmatize(analysis.tag.pos, token.lex.orth,
                                             self.tag_map.get(tag_str, {}))
             self._cache.set(tag_id, token.lex.orth, analysis)
-	if token.lemma == 0:
-	    token.lemma = analysis.lemma
+        if token.lemma == 0:
+            token.lemma = analysis.lemma
         token.pos = analysis.tag.pos
         token.tag = analysis.tag.name
         token.morph = analysis.tag.morph