diff --git a/Lib/multiprocessing/sharedctypes.py b/Lib/multiprocessing/sharedctypes.py
index b569fb2..2430be7 100644
--- a/Lib/multiprocessing/sharedctypes.py
+++ b/Lib/multiprocessing/sharedctypes.py
@@ -78,7 +78,7 @@
     Returns a ctypes array allocated from shared memory
     '''
     type_ = typecode_to_type.get(typecode_or_type, typecode_or_type)
-    if isinstance(size_or_initializer, int):
+    if isinstance(size_or_initializer, (int, long)):
         type_ = type_ * size_or_initializer
         return _new_value(type_)
     else:
diff --git a/Lib/test/test_multiprocessing.py b/Lib/test/test_multiprocessing.py
index c302460..bdfc171 100644
--- a/Lib/test/test_multiprocessing.py
+++ b/Lib/test/test_multiprocessing.py
@@ -918,6 +918,13 @@
         self.test_array(raw=True)
 
     @unittest.skipIf(c_int is None, "requires _ctypes")
+    def test_array_accepts_long(self):
+        arr = self.Array('i', 10L)
+        self.assertEqual(len(arr), 10)
+        raw_arr = self.RawArray('i', 10L)
+        self.assertEqual(len(raw_arr), 10)
+
+    @unittest.skipIf(c_int is None, "requires _ctypes")
     def test_getobj_getlock_obj(self):
         arr1 = self.Array('i', range(10))
         lock1 = arr1.get_lock()
diff --git a/Misc/NEWS b/Misc/NEWS
index 207d3bc..4344e37 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -43,6 +43,9 @@
 Library
 -------
 
+- Issue #11673: Fix multiprocessing Array and RawArray constructors to accept a
+  size of type 'long', rather than only accepting 'int'.
+
 - Issue #10042: Fixed the total_ordering decorator to handle cross-type
   comparisons that could lead to infinite recursion.