diff --git a/include/hashed_db.h b/include/hashed_db.h
index 4dd3933..1ae29b0 100644
--- a/include/hashed_db.h
+++ b/include/hashed_db.h
@@ -31,7 +31,7 @@
  ****************************************************************************/
 
 /*
- * $Id: hashed_db.h,v 1.5 2006/08/19 15:58:34 tom Exp $
+ * $Id: hashed_db.h,v 1.6 2014/04/12 22:41:10 tom Exp $
  */
 
 #ifndef HASHED_DB_H
@@ -41,6 +41,8 @@
 
 #if USE_HASHED_DB
 
+#define DB_DBM_HSEARCH 0	/* quiet gcc -Wundef with db6 */
+
 #include <db.h>
 
 #ifndef DBN_SUFFIX