diff --git a/backends/CMakeLists.txt b/backends/CMakeLists.txt
index cdb2696f9a0bebb27311486ef609d4a36feefa2a..19475c60f62b642b67eac1f18852d1101b1b341a 100644
--- a/backends/CMakeLists.txt
+++ b/backends/CMakeLists.txt
@@ -9,6 +9,8 @@ if (PROTOBUF_FOUND)
 
 	ADD_SUBDIRECTORY(smstools3)
 
+	ADD_SUBDIRECTORY(swiften)
+
 	ADD_SUBDIRECTORY(template)
 
 if (NOT WIN32)