diff --git a/flake.lock b/flake.lock
index 3e08b46..8bd21fe 100644
--- a/flake.lock
+++ b/flake.lock
@@ -109,11 +109,11 @@
         "nixpkgs": "nixpkgs_2"
       },
       "locked": {
-        "lastModified": 1697847645,
-        "narHash": "sha256-Hnc0EGGVTV1w8tnFRJMtEDXl16S9JmlOphYBjiR1u8c=",
+        "lastModified": 1700526194,
+        "narHash": "sha256-/7C9bzFG0Gq/tBAbSwC84Dg5TNPomCcxIJJQNj3Y2BI=",
         "owner": "mitchellh",
         "repo": "zig-overlay",
-        "rev": "5b3efe4890dfee644bb8b7d98834de1b08b35d49",
+        "rev": "2877b025231e96196469ee8a5b80799027b42e03",
         "type": "github"
       },
       "original": {
diff --git a/src/msg_send.zig b/src/msg_send.zig
index 3ad3809..ec830a6 100644
--- a/src/msg_send.zig
+++ b/src/msg_send.zig
@@ -38,9 +38,7 @@ pub fn MsgSend(comptime T: type) type {
             // Build our function type and call it
             const Fn = MsgSendFn(RealReturn, @TypeOf(target.value), @TypeOf(args));
             const msg_send_fn = comptime msgSendPtr(RealReturn, false);
-            // Due to this stage2 Zig issue[1], this must be var for now.
-            // [1]: https://github.com/ziglang/zig/issues/13598
-            var msg_send_ptr: *const Fn = @ptrCast(msg_send_fn);
+            const msg_send_ptr: *const Fn = @ptrCast(msg_send_fn);
             const result = @call(.auto, msg_send_ptr, .{ target.value, sel.value } ++ args);
 
             if (!is_object) return result;
@@ -66,7 +64,7 @@ pub fn MsgSend(comptime T: type) type {
 
             const Fn = MsgSendFn(RealReturn, *c.objc_super, @TypeOf(args));
             const msg_send_fn = comptime msgSendPtr(RealReturn, true);
-            var msg_send_ptr: *const Fn = @ptrCast(msg_send_fn);
+            const msg_send_ptr: *const Fn = @ptrCast(msg_send_fn);
             var super: c.objc_super = .{
                 .receiver = target.value,
                 .super_class = superclass.value,