diff --git a/Web/Authenticate/OpenId.hs b/Web/Authenticate/OpenId.hs
--- a/Web/Authenticate/OpenId.hs
+++ b/Web/Authenticate/OpenId.hs
@@ -39,6 +39,7 @@
                 , ("openid.identity", fromMaybe openid' mdelegate)
                 , ("openid.return_to", complete)
                 , ("openid.trust_root", complete)
+                , ("openid.realm", complete)
                 ]
         Discovery2 (Provider p) (Identifier i) ->
             return $ qsUrl p
@@ -47,6 +48,7 @@
                 , ("openid.claimed_id", i)
                 , ("openid.identity", i)
                 , ("openid.return_to", complete)
+                , ("openid.realm", complete)
                 ]
 
 authenticate :: ( MonadIO m
diff --git a/authenticate.cabal b/authenticate.cabal
--- a/authenticate.cabal
+++ b/authenticate.cabal
@@ -1,5 +1,5 @@
 name:            authenticate
-version:         0.7.2.3
+version:         0.7.2.4
 license:         BSD3
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>