diff --git a/fish_prompt.fish b/fish_prompt.fish
index 7253799..3c2cd4d 100644
--- a/fish_prompt.fish
+++ b/fish_prompt.fish
@@ -383,7 +383,7 @@ function __bobthefish_prompt_status -S -a last_status -d 'Display symbols for a
     and set nonzero $__bobthefish_nonzero_exit_glyph
 
   # if superuser (uid == 0)
-  [ (id -u $USER) -eq 0 ]
+  [ (id -u) -eq 0 ]
     and set superuser $__bobthefish_superuser_glyph
 
   # Jobs display