diff --git a/consensus/XDPoS/engines/engine_v2/testing_utils.go b/consensus/XDPoS/engines/engine_v2/testing_utils.go
index 92c4dd7119..36d6164220 100644
--- a/consensus/XDPoS/engines/engine_v2/testing_utils.go
+++ b/consensus/XDPoS/engines/engine_v2/testing_utils.go
@@ -36,12 +36,12 @@ func (x *XDPoS_v2) GetCurrentRoundFaker() types.Round {
 
 // Utils for test to get current Pool size
 func (x *XDPoS_v2) GetVotePoolSizeFaker(vote *types.Vote) int {
-	return x.votePool.Size(vote)
+	return x.votePool.Size(vote.PoolKey())
 }
 
 // Utils for test to get Timeout Pool Size
 func (x *XDPoS_v2) GetTimeoutPoolSizeFaker(timeout *types.Timeout) int {
-	return x.timeoutPool.Size(timeout)
+	return x.timeoutPool.Size(timeout.PoolKey())
 }
 
 // WARN: This function is designed for testing purpose only!
diff --git a/consensus/XDPoS/utils/pool.go b/consensus/XDPoS/utils/pool.go
index 399db859e8..8792503b7b 100644
--- a/consensus/XDPoS/utils/pool.go
+++ b/consensus/XDPoS/utils/pool.go
@@ -59,10 +59,10 @@ func (p *Pool) Add(obj PoolObj) (int, map[common.Hash]PoolObj) {
 	return numOfItems, dataCopy
 }
 
-func (p *Pool) Size(obj PoolObj) int {
+func (p *Pool) Size(poolKey string) int {
 	p.lock.RLock()
 	defer p.lock.RUnlock()
-	poolKey := obj.PoolKey()
+
 	objListKeyed, ok := p.objList[poolKey]
 	if !ok {
 		return 0