diff --git a/common/types.go b/common/types.go
index aadca87f82..d308b8e8f7 100644
--- a/common/types.go
+++ b/common/types.go
@@ -245,6 +245,12 @@ func (a Address) Cmp(other Address) int {
 // Bytes gets the string representation of the underlying address.
 func (a Address) Bytes() []byte { return a[:] }
 
+func (a Address) Bytes32() []byte {
+	ret := make([]byte, 32)
+	copy(ret, a.Bytes())
+	return ret
+}
+
 // Big converts an address to a big integer.
 func (a Address) Big() *big.Int { return new(big.Int).SetBytes(a[:]) }