diff --git a/exercises/46_optionals2.zig b/exercises/46_optionals2.zig
index 11f37aa..ffa5867 100644
--- a/exercises/46_optionals2.zig
+++ b/exercises/46_optionals2.zig
@@ -9,7 +9,7 @@ const std = @import("std"); // single quotes
 
 const Elephant = struct {
     letter: u8,
-    tail: *Elephant = undefined, // <---- make this optional!
+    tail: *Elephant = null, // <---- make this optional!
     visited: bool = false,
 };
 
diff --git a/patches/patches/46_optionals2.patch b/patches/patches/46_optionals2.patch
index 18284da..5becede 100644
--- a/patches/patches/46_optionals2.patch
+++ b/patches/patches/46_optionals2.patch
@@ -1,11 +1,8 @@
 12c12
-<     tail: *Elephant = undefined, // <---- make this optional!
+<     tail: *Elephant = null, // <---- make this optional!
 ---
->     tail: ?*Elephant = undefined,
-39,42c39
-<         // We should stop once we encounter a tail that
-<         // does NOT point to another element. What can
-<         // we put here to make that happen?
+>     tail: ?*Elephant = null, // <---- make this optional!
+42c42
 <         if (e.tail == null) ???;
 ---
 >         if (e.tail == null) break;