diff --git a/entries/jitenon.py b/entries/jitenon.py
index 7035cff..44740e7 100644
--- a/entries/jitenon.py
+++ b/entries/jitenon.py
@@ -73,9 +73,6 @@ class Jitenon:
 
     def _headwords(self):
         words = []
-        if self.expression == "金棒引き・鉄棒引き":
-            # special case
-            return [["金棒引き", "かなぼうひき"], ["金棒引き", "かなぼうひき"]]
         for yomikata in self.__yomikatas():
             headword = [self.expression, yomikata]
             if headword in words:
diff --git a/entries/jitenon_kotowaza.py b/entries/jitenon_kotowaza.py
index 1b7b352..bcf608e 100644
--- a/entries/jitenon_kotowaza.py
+++ b/entries/jitenon_kotowaza.py
@@ -32,3 +32,10 @@ class JitenonKotowaza(Jitenon):
             ]
             terms.append(term)
         return terms
+
+    def _headwords(self):
+        if self.expression == "金棒引き・鉄棒引き":
+            return [["金棒引き", "かなぼうひき"],
+                    ["鉄棒引き", "かなぼうひき"]]
+        else:
+            return Jitenon._headwords(self)