diff --git a/loopy/kernel/data.py b/loopy/kernel/data.py
index dd68c950e04e29fc99c456412d9dc4a53dbc61b2..975d7b3efe4bcc419a7ca004e1df3b0fbd39d5d9 100644
--- a/loopy/kernel/data.py
+++ b/loopy/kernel/data.py
@@ -385,6 +385,14 @@ class ArrayArg(ArrayBase, KernelArgument):
                 +
                 " aspace: %s" % aspace_str)
 
+    def update_persistent_hash(self, key_hash, key_builder):
+        """Custom hash computation function for use with
+        :class:`pytools.persistent_dict.PersistentDict`.
+        """
+        super(ArrayArg, self).update_persistent_hash(key_hash, key_builder)
+        key_builder.rec(key_hash, self.address_space)
+        key_builder.rec(key_hash, self.is_output_only)
+
 
 # Making this a function prevents incorrect use in isinstance.
 # Note: This is *not* deprecated, as it is super-common and
diff --git a/test/test_loopy.py b/test/test_loopy.py
index 231b70bf71d865e5b9832332c90f3228a0a26b82..119d57adf2c850eba3bb6ad5df3c0a8d0644b70c 100644
--- a/test/test_loopy.py
+++ b/test/test_loopy.py
@@ -3003,6 +3003,18 @@ def test_shape_mismatch_check(ctx_factory):
         prg(queue, a=a, b=b)
 
 
+def test_array_arg_extra_kwargs_persis_hash():
+    from loopy.tools import LoopyKeyBuilder
+
+    a = lp.ArrayArg('a', shape=(10, ), dtype=np.float64,
+            address_space=lp.AddressSpace.LOCAL)
+    not_a = lp.ArrayArg('a', shape=(10, ), dtype=np.float64,
+            address_space=lp.AddressSpace.PRIVATE)
+
+    key_builder = LoopyKeyBuilder()
+    assert key_builder(a) != key_builder(not_a)
+
+
 if __name__ == "__main__":
     if len(sys.argv) > 1:
         exec(sys.argv[1])