diff --git a/loopy/kernel/array.py b/loopy/kernel/array.py
index 6d8349916b4610f4c29f0548f8ee4500ef0f92cd..f86c3f9a3967ae625843506b841a5e6e6503bef6 100644
--- a/loopy/kernel/array.py
+++ b/loopy/kernel/array.py
@@ -614,6 +614,8 @@ class ArrayBase(ImmutableRecord):
         Default to *None*. If an integer N is given, the array would be declared
         with ``__attribute__((aligned(N)))`` in code generation for
         :class:`loopy.CTarget`.
+        
+        .. versionadded:: 2018.1
 
     .. automethod:: __init__
     .. automethod:: __eq__