diff --git a/core/types/transaction.go b/core/types/transaction.go
index 65616f298d..82af9335ff 100644
--- a/core/types/transaction.go
+++ b/core/types/transaction.go
@@ -266,7 +266,7 @@ func (s Transactions) GetRlp(i int) []byte {
 	return enc
 }
 
-// TxDifference returns a new set which is the difference between a to b.
+// TxDifference returns a new set which is the difference between a and b.
 func TxDifference(a, b Transactions) Transactions {
 	keep := make(Transactions, 0, len(a))