VERSION                |  2 +-
 doc/news.rst           |  6 ++++++
 pyderasn.py            | 13 +++++++++++--
 tests/test_pyderasn.py | 24 ++++++++++++------------

diff --git a/VERSION b/VERSION
index 3b7677e103fc46d2868b01e7299d0134ae6411f16cdf5fe37bd4557f179b4ce4..65c7b35a29855a225e3fea4944db9bbcbd5db46b824ad2888a44b6112d8c57c1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.14
+3.15
diff --git a/doc/news.rst b/doc/news.rst
index 01c6e13286186ed1b48f2aaa521f983d58930298fd266c01d8c7d117a0261206..c6bc37d0218b226db2ccff55cf7e10da45d070e211af8f2cef2140c2d821b8a4 100644
--- a/doc/news.rst
+++ b/doc/news.rst
@@ -1,6 +1,12 @@
 News
 ====
 
+.. _release3.15:
+
+3.15
+----
+* DEFAULT-encoded value is checked also for Set-s, not for Sequences only
+
 .. _release3.14:
 
 3.14
diff --git a/pyderasn.py b/pyderasn.py
index 05f5d411ca44d035e73e2ad46b0aa96e40efd4201d0bb38e22c391e721993d86..54c9983489d64c4f2fe68292d2f5ed0a5d9c9e150d4779053ab475fc0e268d05 100755
--- a/pyderasn.py
+++ b/pyderasn.py
@@ -4803,9 +4803,18 @@             value_len = value.fulllen
             sub_offset += value_len
             vlen += value_len
             v = v_tail
-            if spec.default is None or value != spec.default:  # pragma: no cover
-                # SeqMixing.test_encoded_default_accepted covers that place
+            if spec.default is None:
                 values[name] = value
+            else:
+                if value != spec.default:
+                    values[name] = value
+                if ctx.get("strict_default_existence", False):
+                    raise DecodeError(
+                        "DEFAULT value met",
+                        klass=self.__class__,
+                        decode_path=sub_decode_path,
+                        offset=sub_offset,
+                    )
         obj = self.__class__(
             schema=self.specs,
             impl=self.tag,
diff --git a/tests/test_pyderasn.py b/tests/test_pyderasn.py
index da98e5fb560dd4a2b312e8e379b10e879430818fed6a5f0a6781744e29b4d354..f125e3bf94160c79fa44e84bad3bc9f20057d353bae027d741bc4c079efc3f5a 100644
--- a/tests/test_pyderasn.py
+++ b/tests/test_pyderasn.py
@@ -5871,18 +5871,18 @@         _schema = [
             ("int%d" % i, Integer(expl=tag_ctxc(i + 1)))
             for i in range(count)
         ]
-
-        class Seq(Sequence):
-            schema = _schema
-        seq = Seq()
-        for i in range(count):
-            seq["int%d" % i] = Integer(123)
-        raw = seq.encode()
-        chosen = "int%d" % chosen
-        seq.specs[chosen] = seq.specs[chosen](default=123)
-        seq.decode(raw)
-        with assertRaisesRegex(self, DecodeError, "DEFAULT value met"):
-            seq.decode(raw, ctx={"strict_default_existence": True})
+        for klass in (Sequence, Set):
+            class Seq(klass):
+                schema = _schema
+            seq = Seq()
+            for i in range(count):
+                seq["int%d" % i] = Integer(123)
+            raw = seq.encode()
+            chosen_choice = "int%d" % chosen
+            seq.specs[chosen_choice] = seq.specs[chosen_choice](default=123)
+            seq.decode(raw)
+            with assertRaisesRegex(self, DecodeError, "DEFAULT value met"):
+                seq.decode(raw, ctx={"strict_default_existence": True})
 
 
 class TestX690PrefixedType(TestCase):