diff --git a/src/wormhole/_boss.py b/src/wormhole/_boss.py
index a8cf5e4..f6c89f7 100644
--- a/src/wormhole/_boss.py
+++ b/src/wormhole/_boss.py
@@ -114,11 +114,11 @@ class Boss(object):
     # would require the Wormhole to be aware of Code (whereas right now
     # Wormhole only knows about this Boss instance, and everything else is
     # hidden away).
-    def input_code(self, stdio):
+    def input_code(self, helper):
         if self._did_start_code:
             raise OnlyOneCodeError()
         self._did_start_code = True
-        self._C.input_code(stdio)
+        self._C.input_code(helper)
     def allocate_code(self, code_length):
         if self._did_start_code:
             raise OnlyOneCodeError()
diff --git a/src/wormhole/_code.py b/src/wormhole/_code.py
index 307dc5e..ac4d30c 100644
--- a/src/wormhole/_code.py
+++ b/src/wormhole/_code.py
@@ -52,7 +52,7 @@ class Code(object):
     @m.input()
     def allocate_code(self, code_length): pass
     @m.input()
-    def input_code(self, stdio): pass
+    def input_code(self, input_helper): pass
     @m.input()
     def set_code(self, code): pass
 
@@ -80,8 +80,8 @@ class Code(object):
     def L_refresh_nameplates(self):
         self._L.refresh_nameplates()
     @m.output()
-    def start_input_and_L_refresh_nameplates(self, stdio):
-        self._stdio = stdio
+    def start_input_and_L_refresh_nameplates(self, input_helper):
+        self._input_helper = input_helper
         self._L.refresh_nameplates()
     @m.output()
     def stash_code_length_and_RC_tx_allocate(self, code_length):