diff --git a/src/BTrees/_base.py b/src/BTrees/_base.py
index 2c48ede..8a3b278 100644
--- a/src/BTrees/_base.py
+++ b/src/BTrees/_base.py
@@ -995,8 +995,7 @@ def has_key(self, key):
         index = self._search(key)
         if index < 0:
             return False
-        r = self._data[index].child.has_key(key)
-        return bool(r and r + 1)
+        return self._data[index].child.has_key(key)
 
     def keys(self, min=_marker, max=_marker,
              excludemin=False, excludemax=False,