diff --git a/mm1_modem_proxy_interface.h b/mm1_modem_proxy_interface.h
index c8ba445..b1c4c16 100644
--- a/mm1_modem_proxy_interface.h
+++ b/mm1_modem_proxy_interface.h
@@ -87,6 +87,7 @@
   virtual uint32_t State() = 0;
   virtual uint32_t AccessTechnologies() = 0;
   virtual const ::DBus::Struct< uint32_t, bool > SignalQuality() = 0;
+  virtual const std::vector< std::string > OwnNumbers() = 0;
   virtual uint32_t SupportedModes() = 0;
   virtual uint32_t AllowedModes() = 0;
   virtual uint32_t PreferredMode() = 0;