diff --git a/common/types.go b/common/types.go
index 7184b2b112..bf74e43716 100644
--- a/common/types.go
+++ b/common/types.go
@@ -239,6 +239,9 @@ func (a Address) Cmp(other Address) int {
 // Bytes gets the string representation of the underlying address.
 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[:]) }