diff --git a/docs/userguide b/docs/userguide
index 65d82d97..816fbc34 100644
--- a/docs/userguide
+++ b/docs/userguide
@@ -1340,7 +1340,9 @@ bar {
 }
 
 # show tray icons on the primary monitor
-tray_output primary
+bar {
+    tray_output primary
+}
 
 # show tray icons on the big monitor
 bar {