diff --git a/Lib/ctypes/test/test_structures.py b/Lib/ctypes/test/test_structures.py
index 8f6fe5f..6ec6ef3 100644
--- a/Lib/ctypes/test/test_structures.py
+++ b/Lib/ctypes/test/test_structures.py
@@ -3,6 +3,7 @@ from ctypes import *
 from ctypes.test import need_symbol
 from struct import calcsize
 import _testcapi
+import _ctypes_test
 
 class SubclassesTest(unittest.TestCase):
     def test_subclass(self):
@@ -391,6 +392,28 @@ class StructureTestCase(unittest.TestCase):
                          (1, 0, 0, 0, 0, 0))
         self.assertRaises(TypeError, lambda: Z(1, 2, 3, 4, 5, 6, 7))
 
+    def test_array_in_struct(self):
+        # This should mirror the structure in Modules/_ctypes/_ctypes_test.c
+        class Test2(Structure):
+            _fields_ = [
+                ('data', c_ubyte * 16),
+            ]
+
+        s = Test2()
+        expected = 0
+        for i in range(16):
+            s.data[i] = i
+            expected += i
+        dll = CDLL(_ctypes_test.__file__)
+        func = dll._testfunc_array_in_struct
+        func.restype = c_int
+        func.argtypes = (Test2,)
+        result = func(s)
+        self.assertEqual(result, expected)
+        # check the passed-in struct hasn't changed
+        for i in range(16):
+            self.assertEqual(s.data[i], i)
+
 class PointerMemberTestCase(unittest.TestCase):
 
     def test(self):
diff --git a/Modules/_ctypes/_ctypes_test.c b/Modules/_ctypes/_ctypes_test.c
index 92b5adb..35799b8 100644
--- a/Modules/_ctypes/_ctypes_test.c
+++ b/Modules/_ctypes/_ctypes_test.c
@@ -44,6 +44,24 @@ _testfunc_cbk_large_struct(Test in, void (*func)(Test))
     func(in);
 }
 
+typedef struct {
+    unsigned char data[16];
+} Test2;
+
+EXPORT(int)
+_testfunc_array_in_struct(Test2 in)
+{
+    int result = 0;
+
+    for (unsigned i = 0; i < 16; i++)
+        result += in.data[i];
+    /* As the structure is passed by value, changes to it shouldn't be
+     * reflected in the caller.
+     */
+    memset(in.data, 0, sizeof(in.data));
+    return result;
+}
+
 EXPORT(void)testfunc_array(int values[4])
 {
     printf("testfunc_array %d %d %d %d\n",