diff --git a/filecache.module b/filecache.module
index 1d23094..d6186f6 100644
--- a/filecache.module
+++ b/filecache.module
@@ -42,8 +42,11 @@ function filecache_cron() {
     if ($cache->expire == CACHE_PERMANENT) {
       continue;
     }
-    if ($cache->expire == CACHE_TEMPORARY ||
-        $cache->expire < REQUEST_TIME) {
+    $expiry_date = $cache->expire;
+    if ($cache->expire == CACHE_TEMPORARY) {
+      $expiry_date = $cache->created + variable_get('cache_lifetime', 0);
+    }
+    if ($expiry_date < REQUEST_TIME) {
       @unlink($filename);
     }
   } // foreach $filename