diff --git a/mwclient/client.py b/mwclient/client.py
index f6ad7cb4d845c90ef726d6208824257dca0f43d0..21fe95f766b4bd07b07a23e729ebf2eba2f4887e 100644
--- a/mwclient/client.py
+++ b/mwclient/client.py
@@ -265,7 +265,7 @@ class Site(object):
 		postdata['uselang'] = 'en'
 		postdata['title'] = u'Special:Emailuser/' + user
 
-		data = self.raw_index('submit', postdata)
+		data = self.raw_index('submit', **postdata)
 		if 'var wgAction = "success";' not in data:
 			if 'This user has not specified a valid e-mail address' in data:
 				# Dirty hack