diff --git a/ib002/04-recursion/karel_1.md b/ib002/04-recursion/karel_1.md
index 1b2dcbc..410e46b 100644
--- a/ib002/04-recursion/karel_1.md
+++ b/ib002/04-recursion/karel_1.md
@@ -9,7 +9,7 @@ tags:
 - backtracking
 ---
 
-- [Sources](pathname://files/ib002/karel_1)
+- [Sources](pathname:///files/ib002/karel_1)
 
 ## Introduction