diff --git a/share/functions/__fish_sgrep.fish b/share/functions/__fish_sgrep.fish
index 72f284b9d..6dadabfe1 100644
--- a/share/functions/__fish_sgrep.fish
+++ b/share/functions/__fish_sgrep.fish
@@ -1,4 +1,4 @@
-
+# This function is deprecated. Do not introduce new uses. Use the `string` command instead.
 function __fish_sgrep -d "Call grep without honoring GREP_OPTIONS settings"
     set -l GREP_OPTIONS
     command grep $argv