diff --git a/headers/private/app/RegistrarDefs.h b/headers/private/app/RegistrarDefs.h
index 6a24e1587b..b793e7ca69 100644
--- a/headers/private/app/RegistrarDefs.h
+++ b/headers/private/app/RegistrarDefs.h
@@ -93,6 +93,7 @@ enum {
 	B_REG_GET_MESSAGE_RUNNER_INFO			= 'rgri',
 	// internal registrar messages
 	B_REG_ROSTER_SANITY_EVENT				= 'rgir',
+	B_REG_ROSTER_DEVICE_RESCAN				= 'rgrs',
 	// clipboard handler requests
 	B_REG_ADD_CLIPBOARD						= 'rgCa',
 	B_REG_GET_CLIPBOARD_COUNT				= 'rgCc',