diff --git a/api/peer_connection_factory_proxy.h b/api/peer_connection_factory_proxy.h
index e33fb457ae..be098e34d8 100644
--- a/api/peer_connection_factory_proxy.h
+++ b/api/peer_connection_factory_proxy.h
@@ -36,6 +36,10 @@ PROXY_METHOD2(rtc::scoped_refptr<PeerConnectionInterface>,
               CreatePeerConnection,
               const PeerConnectionInterface::RTCConfiguration&,
               PeerConnectionDependencies)
+PROXY_METHOD2(RTCErrorOr<rtc::scoped_refptr<PeerConnectionInterface>>,
+              CreatePeerConnectionOrError,
+              const PeerConnectionInterface::RTCConfiguration&,
+              PeerConnectionDependencies)
 PROXY_CONSTMETHOD1(webrtc::RtpCapabilities,
                    GetRtpSenderCapabilities,
                    cricket::MediaType)
diff --git a/api/test/mock_peer_connection_factory_interface.h b/api/test/mock_peer_connection_factory_interface.h
index 7319cebbcc..c2f2435fb8 100644
--- a/api/test/mock_peer_connection_factory_interface.h
+++ b/api/test/mock_peer_connection_factory_interface.h
@@ -32,6 +32,11 @@ class MockPeerConnectionFactoryInterface final
               (const PeerConnectionInterface::RTCConfiguration&,
                PeerConnectionDependencies),
               (override));
+  MOCK_METHOD(RTCErrorOr<rtc::scoped_refptr<PeerConnectionInterface>>,
+              CreatePeerConnectionOrError,
+              (const PeerConnectionInterface::RTCConfiguration&,
+               PeerConnectionDependencies),
+              (override));
   MOCK_METHOD(rtc::scoped_refptr<PeerConnectionInterface>,
               CreatePeerConnection,
               (const PeerConnectionInterface::RTCConfiguration&,