diff --git a/python/pyspark/rdd.py b/python/pyspark/rdd.py
index 56e892243c79cc08cf623c757c485009ea78750a..4b4d59647b2bc25ce0f1620bac78c9e20e05ec7e 100644
--- a/python/pyspark/rdd.py
+++ b/python/pyspark/rdd.py
@@ -1760,7 +1760,6 @@ class RDD(object):
         In addition, users can control the partitioning of the output RDD.
 
         >>> x = sc.parallelize([("a", 1), ("b", 1), ("a", 1)])
-        >>> def f(x): return x
         >>> def add(a, b): return a + str(b)
         >>> sorted(x.combineByKey(str, add, add).collect())
         [('a', '11'), ('b', '1')]