diff --git a/Lib/test/test_operator.py b/Lib/test/test_operator.py
index c1fe88c..3cc0f1e 100644
--- a/Lib/test/test_operator.py
+++ b/Lib/test/test_operator.py
@@ -215,6 +215,8 @@
         self.failUnless(operator.isSequenceType(xrange(10)))
         self.failUnless(operator.isSequenceType('yeahbuddy'))
         self.failIf(operator.isSequenceType(3))
+        class Dict(dict): pass
+        self.failIf(operator.isSequenceType(Dict()))
 
     def test_lshift(self):
         self.failUnlessRaises(TypeError, operator.lshift)
diff --git a/Misc/NEWS b/Misc/NEWS
index e628f44..a24ec26 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -103,6 +103,8 @@
 Extension Modules
 -----------------
 
+- Bug #1575169: operator.isSequenceType() now returns False for subclasses of dict.
+
 - collections.defaultdict() now verifies that the factory function is callable.
 
 - Bug #1486663: don't reject keyword arguments for subclasses of builtin
diff --git a/Objects/abstract.c b/Objects/abstract.c
index 7115c52..7462c58 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -1157,6 +1157,8 @@
 {
 	if (s && PyInstance_Check(s))
 		return PyObject_HasAttrString(s, "__getitem__");
+	if (PyObject_IsInstance(s, &PyDict_Type))
+		return 0;
 	return s != NULL && s->ob_type->tp_as_sequence &&
 		s->ob_type->tp_as_sequence->sq_item != NULL;
 }