diff --git a/include/dbus.h b/include/dbus.h
index 65bda721..5bf26692 100644
--- a/include/dbus.h
+++ b/include/dbus.h
@@ -58,6 +58,7 @@ extern "C" {
 #define OFONO_LOCATION_REPORTING_INTERFACE OFONO_SERVICE ".LocationReporting"
 #define OFONO_GNSS_INTERFACE "org.ofono.AssistedSatelliteNavigation"
 #define OFONO_GNSS_POSR_AGENT_INTERFACE "org.ofono.PositioningRequestAgent"
+#define OFONO_HANDSFREE_INTERFACE OFONO_SERVICE ".Handsfree"
 
 /* CDMA Interfaces */
 #define OFONO_CDMA_VOICECALL_MANAGER_INTERFACE "org.ofono.cdma.VoiceCallManager"