diff --git a/Lib/bsddb/__init__.py b/Lib/bsddb/__init__.py
index 0fc1892..cfe554b 100644
--- a/Lib/bsddb/__init__.py
+++ b/Lib/bsddb/__init__.py
@@ -372,6 +372,8 @@
 try:
     import thread
     del thread
+    if db.version() < (3, 3, 0):
+        db.DB_THREAD = 0
 except ImportError:
     db.DB_THREAD = 0