diff --git a/loopy/__init__.py b/loopy/__init__.py
index 83b876d5e93f1c1328448333789ce9d0f24710e8..d7309a6a528d8b332e1f710dca27d95a4ce44a46 100644
--- a/loopy/__init__.py
+++ b/loopy/__init__.py
@@ -1153,12 +1153,12 @@ def _split_reduction(kernel, inames, direction, within=None):
 
 def split_reduction_inward(kernel, inames, within=None):
     # FIXME document me
-    _split_reduction(kernel, inames, "in", within)
+    return _split_reduction(kernel, inames, "in", within)
 
 
 def split_reduction_outward(kernel, inames, within=None):
     # FIXME document me
-    _split_reduction(kernel, inames, "out", within)
+    return _split_reduction(kernel, inames, "out", within)
 
 # }}}