diff --git a/knots/resource-pool.scm b/knots/resource-pool.scm
index c233e29..232df77 100644
--- a/knots/resource-pool.scm
+++ b/knots/resource-pool.scm
@@ -767,8 +767,7 @@
                    (loop resources
                          available
                          waiters
-                         (cons (get-internal-real-time)
-                               resources-last-used))))
+                         resources-last-used)))
 
              (let ((current-internal-time
                     (get-internal-real-time)))