diff --git a/adjuster.py b/adjuster.py
index 4780e3fbd97c6ecb30ca9fd1d969eeacbc264828..89e5951c9a07b9c8e9a1040866c7016ef1b777df 100755
--- a/adjuster.py
+++ b/adjuster.py
@@ -1841,8 +1841,7 @@ document.forms[0].i.focus()
         added = {'set-cookie':1} # might have been set by authenticates_ok
         for name,value in headers_to_add:
           value = value.replace("\t"," ") # needed for some servers
-          
-          elif name.lower() in added: self.add_header(name,value)
+          if name.lower() in added: self.add_header(name,value)
           else: self.set_header(name,value) # overriding any Tornado default
           added[name.lower()]=1
         if doRedirect: