diff --git a/common/types.go b/common/types.go
index 2205835cb5d0..218ca0be4c44 100644
--- a/common/types.go
+++ b/common/types.go
@@ -231,6 +231,9 @@ func (a Address) Bytes() []byte { return a[:] }
 // Hash converts an address to a hash by left-padding it with zeros.
 func (a Address) Hash() Hash { return BytesToHash(a[:]) }
 
+// Big converts an address to a big integer.
+func (a Address) Big() *big.Int { return new(big.Int).SetBytes(a[:]) }
+
 // Hex returns an EIP55-compliant hex string representation of the address.
 func (a Address) Hex() string {
 	return string(a.checksumHex())