diff --git a/usr.sbin/sendmail/makemap/makemap.c b/usr.sbin/sendmail/makemap/makemap.c
index 707c167327df..45e120278d47 100644
--- a/usr.sbin/sendmail/makemap/makemap.c
+++ b/usr.sbin/sendmail/makemap/makemap.c
@@ -312,6 +312,7 @@ main(argc, argv)
 #ifdef NEWDB
 	  case T_HASH:
 		/* tweak some parameters for performance */
+		bzero(&hinfo, sizeof(hinfo));
 		hinfo.nelem = 4096;
 		hinfo.cachesize = dbcachesize;