diff --git a/share/functions/fish_jj_prompt.fish b/share/functions/fish_jj_prompt.fish
index b65f103ed..d0c07a691 100644
--- a/share/functions/fish_jj_prompt.fish
+++ b/share/functions/fish_jj_prompt.fish
@@ -15,7 +15,8 @@ function fish_jj_prompt
                 )
             '
     )"
-    if test -n $info
+    or return 1
+    if test -n "$info"
         printf ' %s' $info
     end
 end