diff --git a/share/completions/j.fish b/share/completions/j.fish
index a44f90987..be799ee48 100644
--- a/share/completions/j.fish
+++ b/share/completions/j.fish
@@ -1,5 +1,5 @@
 function __history_completions --argument limit
-    if echo $limit | string match -q ""
+    if string match -q "" -- "$limit"
         set limit 25
     end