diff --git a/docs/release.rst b/docs/release.rst
index 0205433f..a29d6464 100644
--- a/docs/release.rst
+++ b/docs/release.rst
@@ -21,6 +21,9 @@ Fix
 Maintenance
 ~~~~~~~~~~~
 
+* Remove unnecessary None argument to .get(), it is the default value.
+  By :user:`Dimitri Papadopoulos Orfanos <DimitriPapadopoulos>`, :issue:`395`.
+
 * Apply refurb suggestions.
   By :user:`Dimitri Papadopoulos Orfanos <DimitriPapadopoulos>`, :issue:`372`.
 
diff --git a/numcodecs/ndarray_like.py b/numcodecs/ndarray_like.py
index 23d4fd41..22fe2d06 100644
--- a/numcodecs/ndarray_like.py
+++ b/numcodecs/ndarray_like.py
@@ -20,7 +20,7 @@ class _CachedProtocolMeta(Protocol.__class__):
 
     def __instancecheck__(self, instance):
         key = (self, instance.__class__)
-        ret = self._instancecheck_cache.get(key, None)
+        ret = self._instancecheck_cache.get(key)
         if ret is None:
             ret = super().__instancecheck__(instance)
             self._instancecheck_cache[key] = ret