diff --git a/client.go b/client.go
index c0b2cae..4a6f7f9 100644
--- a/client.go
+++ b/client.go
@@ -277,6 +277,7 @@ func (c *client) mainloop(ctx context.Context, params *lookupParams) {
 					continue
 				}
 				if _, ok := sentEntries[k]; ok {
+					sentEntries[k].Expiry = e.Expiry
 					continue
 				}