diff --git a/proxy.rkt b/proxy.rkt
index 48edabe..2d075b2 100644
--- a/proxy.rkt
+++ b/proxy.rkt
@@ -184,8 +184,8 @@
 	 [(network-reply _ answer)
 	  (define-values (new-zone timers) (incorporate-complete-answer answer zone))
 	  (transition-and-set-timers new-zone timers)]
-	 [(timer-expired (list 'check-dns-expiry name) _)
-	  (zone-expire-name zone name)])))))
+	 [(timer-expired (list 'check-dns-expiry name) now-msec)
+	  (zone-expire-name zone name (/ now-msec 1000.0))])))))
 
 (struct question-state (zone q client-sock nameservers-tried retry-count) #:transparent)
 (struct expanding-cnames (q accumulator remaining-count) #:transparent)
diff --git a/zonedb.rkt b/zonedb.rkt
index 5a01ba6..ae7b600 100644
--- a/zonedb.rkt
+++ b/zonedb.rkt
@@ -98,11 +98,10 @@
 ;; CompiledZone DomainName -> CompiledZone
 ;; Checks the given name to see if there are any expiring records, and
 ;; if so, removes them.
-(define (zone-expire-name db name)
-  (define now (current-inexact-seconds))
+(define (zone-expire-name db name now-seconds)
   (define new-expirymap
     (if (zone-includes-name? db name)
-	(for/hash ([(resource expiry) (hash-ref db name)] #:when (still-valid? expiry now))
+	(for/hash ([(resource expiry) (hash-ref db name)] #:when (still-valid? expiry now-seconds))
 	  (values resource expiry))
 	(hash)))
   (if (zero? (hash-count new-expirymap))
@@ -112,9 +111,10 @@
 ;; CompiledZone -> (values CompiledZone Timers)
 ;; Used to freshen a saved zone when it is loaded from disk.
 (define (zone-expire zone)
+  (define now-seconds (current-inexact-seconds))
   (for/fold ([zone zone] [timers (set)])
       ([name (hash-keys zone)])
-    (define new-zone (zone-expire-name zone name))
+    (define new-zone (zone-expire-name zone name now-seconds))
     (cond
      [(hash-ref new-zone name #f) =>
       (lambda (expirymap)