diff --git a/gensim/models/ldamodel.py b/gensim/models/ldamodel.py
index 439aeb91fb..f9fb09801a 100755
--- a/gensim/models/ldamodel.py
+++ b/gensim/models/ldamodel.py
@@ -693,7 +693,7 @@ def inference(self, chunk, collect_sstats=False):
             expElogthetad = expElogtheta[d, :]
             expElogbetad = self.expElogbeta[:, ids]
 
-            # The optimal phi_{dwk} is proportional to expElogthetad_k * expElogbetad_w.
+            # The optimal phi_{dwk} is proportional to expElogthetad_k * expElogbetad_kw.
             # phinorm is the normalizer.
             # TODO treat zeros explicitly, instead of adding epsilon?
             phinorm = np.dot(expElogthetad, expElogbetad) + epsilon