diff --git a/python/np-arrays.py b/python/np-arrays.py
index 45c86ff..b459e00 100644
--- a/python/np-arrays.py
+++ b/python/np-arrays.py
@@ -1,3 +1,3 @@
-def arrays(arr):
+def arrays(arr[]):
     return numpy.array(arr[::-1], float)