diff --git a/pymongo/bson.py b/pymongo/bson.py
index <HASH>..<HASH> 100644
--- a/pymongo/bson.py
+++ b/pymongo/bson.py
@@ -369,8 +369,8 @@ def _dict_to_bson(dict):
 
     length = len(elements) + 5
     return struct.pack("<i", length) + elements + "\x00"
-if _use_c:
-    _dict_to_bson = _cbson._dict_to_bson
+# if _use_c:
+#     _dict_to_bson = _cbson._dict_to_bson
 
 def is_valid(bson):
     """Validate that the given string represents valid BSON data.
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