diff --git a/src/pylib/pystring/split/reimporter.nim b/src/pylib/pystring/split/reimporter.nim
index 0d6c3c997..bfd565c20 100644
--- a/src/pylib/pystring/split/reimporter.nim
+++ b/src/pylib/pystring/split/reimporter.nim
@@ -3,7 +3,8 @@
 import ../errHandle
 import ../consts
 import ../../builtins/list
+import ../../noneType
 
 
-export errHandle, list, consts
+export errHandle, list, consts, noneType
 
diff --git a/src/pylib/pystring/split/split.nim b/src/pylib/pystring/split/split.nim
index d4dfc3b15..d5c32f3e6 100644
--- a/src/pylib/pystring/split/split.nim
+++ b/src/pylib/pystring/split/split.nim
@@ -6,7 +6,7 @@ import ./reimporter
 import ./split_whitespace
 
 
-iterator split*(a: PyStr, maxsplit = -1): PyStr =
+iterator split*(a: PyStr, sep = None, maxsplit = -1): PyStr =
   ## with unicode whitespaces as sep.
   ## 
   ## treat runs of whitespaces as one sep (i.e.
@@ -28,7 +28,7 @@ iterator split*(a: StringLike,
   noEmptySep sep
   for i in splitNoCheck($a, sep, maxsplit): yield i
 
-proc split*(a: StringLike, maxsplit = -1): PyList[PyStr] =
+proc split*(a: StringLike, sep = None, maxsplit = -1): PyList[PyStr] =
   str(a).split_whitespace(maxsplit)
 
 # strutils.split func does not use any predicted capacity.