diff --git a/headers/private/app/ServerProtocol.h b/headers/private/app/ServerProtocol.h
index bad896e9d3..d7658dedc8 100644
--- a/headers/private/app/ServerProtocol.h
+++ b/headers/private/app/ServerProtocol.h
@@ -91,6 +91,7 @@ enum {
 	AS_DOWNLOAD_PICTURE,
 
 	// Font-related server communications
+	AS_SET_SYSTEM_FONT,
 	AS_QUERY_FONTS_CHANGED,
 	AS_UPDATED_CLIENT_FONTLIST,
 	AS_GET_FAMILY_NAME,