diff --git a/tools/cache/delta_fifo.go b/tools/cache/delta_fifo.go
index 2160285b..6a77b32f 100644
--- a/tools/cache/delta_fifo.go
+++ b/tools/cache/delta_fifo.go
@@ -572,7 +572,7 @@ func (f *DeltaFIFO) Pop(process PopProcessFunc) (interface{}, error) {
 // of the Deltas associated with K.  Otherwise the pre-existing keys
 // are those listed by `f.knownObjects` and the current object of K is
 // what `f.knownObjects.GetByKey(K)` returns.
-func (f *DeltaFIFO) Replace(list []interface{}, resourceVersion string) error {
+func (f *DeltaFIFO) Replace(list []interface{}, _ string) error {
 	f.lock.Lock()
 	defer f.lock.Unlock()
 	keys := make(sets.String, len(list))