diff --git a/pages/osx/mdutil.md b/pages/osx/mdutil.md
index efcf728d52..76c4b35ac3 100644
--- a/pages/osx/mdutil.md
+++ b/pages/osx/mdutil.md
@@ -10,6 +10,10 @@
 
 `mdutil -i {{on|off}} {{path/to/volume}}`
 
+- Turn on/off indexing for all volumes:
+
+`mdutil -a -i {{on|off}}`
+
 - Erase the metadata stores and restart the indexing process:
 
 `mdutil -E {{path/to/volume}}`