diff --git a/.ycm_extra_conf.py b/.ycm_extra_conf.py
index 06a2344661..57b868a18e 100644
--- a/.ycm_extra_conf.py
+++ b/.ycm_extra_conf.py
@@ -11,6 +11,8 @@ flags = [
 '/usr/include/dbus-1.0',
 '-I',
 './src/shared',
+'-I',
+'./src/systemd',
 '-Wall',
 '-Wextra',
 '-Werror',