diff --git a/src/packaging/tags.py b/src/packaging/tags.py
index 8522f59c4..8864505ab 100644
--- a/src/packaging/tags.py
+++ b/src/packaging/tags.py
@@ -13,6 +13,7 @@
 import sysconfig
 from importlib.machinery import EXTENSION_SUFFIXES
 from typing import (
+    Any,
     Iterable,
     Iterator,
     Sequence,
@@ -92,6 +93,13 @@ def __str__(self) -> str:
     def __repr__(self) -> str:
         return f"<{self} @ {id(self)}>"
 
+    def __setstate__(self, state: tuple[dict[str, Any], dict[str, Any]]) -> None:
+        # The cached _hash is wrong when unpickling.
+        _old_hash, slots = state
+        for k, v in slots.items():
+            setattr(self, k, v)
+        self._hash = hash((self._interpreter, self._abi, self._platform))
+
 
 def parse_tag(tag: str) -> frozenset[Tag]:
     """
diff --git a/tests/test_tags.py b/tests/test_tags.py
index 012acb130..63ad82483 100644
--- a/tests/test_tags.py
+++ b/tests/test_tags.py
@@ -13,6 +13,7 @@
 import importlib
 import os
 import pathlib
+import pickle
 import platform
 import struct
 import sys
@@ -1571,3 +1572,9 @@ def _calcsize(fmt):
         monkeypatch.setattr(struct, "calcsize", _calcsize)
         importlib.reload(tags)
         assert tags._32_BIT_INTERPRETER == expected
+
+
+def test_pickle():
+    # Make sure equality works between a pickle/unpickle round trip.
+    tag = tags.Tag("py3", "none", "any")
+    assert pickle.loads(pickle.dumps(tag)) == tag