diff --git a/fish_prompt.fish b/fish_prompt.fish
index 9659c74..a3d8609 100644
--- a/fish_prompt.fish
+++ b/fish_prompt.fish
@@ -416,7 +416,7 @@ function __bobthefish_prompt_status -S -a last_status -d 'Display flags for a no
     # will be wrong. But I can't think of a single reason that would happen, and
     # it is literally 99.5% faster to check it this way, so that's a tradeoff I'm
     # willing to make.
-    [ -w / ]
+    [ -w / -o -w /private/ ]
     and [ (id -u) -eq 0 ]
     and set superuser 1