diff --git a/asdf.fish b/asdf.fish
index 2554ab5b..6f7a3050 100644
--- a/asdf.fish
+++ b/asdf.fish
@@ -1,5 +1,5 @@
 if test -z $ASDF_DIR
-    set ASDF_DIR (realpath --no-symlinks (dirname (status filename)))
+    set ASDF_DIR (builtin realpath --no-symlinks (dirname (status filename)))
 end
 set --export ASDF_DIR $ASDF_DIR