diff --git a/pandas/core/series.py b/pandas/core/series.py
index 0d7288edac5d3..7abd95c68ea2b 100644
--- a/pandas/core/series.py
+++ b/pandas/core/series.py
@@ -3217,7 +3217,7 @@ def _reindex_indexer(self, new_index, indexer, copy):
             return self
 
         new_values = algorithms.take_1d(self._values, indexer,
-                                        allow_fillTrue, fill_value=None)
+                                        allow_fill=True, fill_value=None)
         return self._constructor(new_values, index=new_index)
 
     def _needs_reindex_multi(self, axes, method, level):