diff --git a/docs/source/api-states.rst b/docs/source/api-states.rst
index c1c0befbe7..de12ffbf7d 100644
--- a/docs/source/api-states.rst
+++ b/docs/source/api-states.rst
@@ -109,7 +109,7 @@ Where:
   * ``OwnableState`` also override the default behavior of the vault's relevancy check. The default vault
     implementation will track any ``OwnableState`` of which it is the owner.
 
-* ``withNewOwner(newOwner: PublicKey)`` creates an identical copy of the state, only with a new owner
+* ``withNewOwner(newOwner: AbstractParty)`` creates an identical copy of the state, only with a new owner
 
 Other interfaces
 ^^^^^^^^^^^^^^^^
@@ -150,4 +150,4 @@ Where:
 * ``data`` is the state to be stored on-ledger
 * ``notary`` is the notary service for this state
 * ``encumbrance`` points to another state that must also appear as an input to any transaction consuming this
-  state
\ No newline at end of file
+  state