diff --git a/core/state_prefetcher.go b/core/state_prefetcher.go
index c0ce705c77..6c314626df 100644
--- a/core/state_prefetcher.go
+++ b/core/state_prefetcher.go
@@ -124,5 +124,4 @@ func (p *statePrefetcher) Prefetch(block *types.Block, statedb *state.StateDB, c
 
 	blockPrefetchTxsValidMeter.Mark(int64(len(block.Transactions())) - fails.Load())
 	blockPrefetchTxsInvalidMeter.Mark(fails.Load())
-	return
 }
diff --git a/core/vm/eips.go b/core/vm/eips.go
index 025b420cf7..79fd24d13e 100644
--- a/core/vm/eips.go
+++ b/core/vm/eips.go
@@ -60,7 +60,7 @@ func ValidEip(eipNum int) bool {
 	return ok
 }
 func ActivateableEips() []string {
-	nums []string
+	var nums []string
 	for k := range activators {
 		nums = append(nums, fmt.Sprintf("%d", k))
 	}