1 files changed, 6 insertions, 4 deletions

diff --git a/src/mailman_pgp/pgp/inline.py b/src/mailman_pgp/pgp/inline.py
index a327ef4..06ecee5 100644
--- a/src/mailman_pgp/pgp/inline.py
+++ b/src/mailman_pgp/pgp/inline.py
@@ -159,25 +159,27 @@ class InlineWrapper:
             if not part.is_multipart() and self._is_signed(part):
                 yield self._verify(part, key)
 
-    def _sign(self, part, key):
+    def _sign(self, part, key, hash):
         payload = str(part.get_payload())
         pmsg = PGPMessage.new(payload, cleartext=True)
-        pmsg |= key.sign(pmsg)
+        pmsg |= key.sign(pmsg, hash=hash)
         part.set_payload(str(pmsg))
 
-    def sign(self, key):
+    def sign(self, key, hash=None):
         """
         Sign a message with key.
 
         :param key: The key to sign with.
         :type key: pgpy.PGPKey
+        :param hash: The hash algorithm to use.
+        :type hash: pgpy.constants.HashAlgorithm
         :return: The signed message.
         :rtype: mailman.email.message.Message
         """
         out = copy.deepcopy(self.msg)
         for part in walk(out):
             if not part.is_multipart():
-                self._sign(part, key)
+                self._sign(part, key, hash)
         return out
 
     def _decrypt(self, part, key):