diff --git a/lib/std/Io/Dispatch.zig b/lib/std/Io/Dispatch.zig
index 1bc5195565c0452ef0363ce561c2609eba4cb5fb..615e77f2ca970f5bae3ebf5c703667b00b11d5a9 100644
--- a/lib/std/Io/Dispatch.zig
+++ b/lib/std/Io/Dispatch.zig
@@ -719,10 +719,9 @@ const Cancelable = struct {
     queue: c.dispatch.queue_t,
     cancel: c.dispatch.function_t,
 
-    const is_blocked: c.dispatch.function_t =
-        @ptrFromInt(@typeInfo(c.dispatch.function_t).pointer.alignment * 1);
-    const is_requested: c.dispatch.function_t =
-        @ptrFromInt(@typeInfo(c.dispatch.function_t).pointer.alignment * 2);
+    const fn_ptr_align = std.meta.alignment(c.dispatch.function_t);
+    const is_blocked: c.dispatch.function_t = @ptrFromInt(fn_ptr_align * 1);
+    const is_requested: c.dispatch.function_t = @ptrFromInt(fn_ptr_align * 2);
 
     const blocked: Cancelable = .{ .queue = undefined, .cancel = is_blocked };