diff --git a/lib/std/meta.zig b/lib/std/meta.zig
index c8ef19c017b3..848c088d6a5e 100644
--- a/lib/std/meta.zig
+++ b/lib/std/meta.zig
@@ -1091,11 +1091,14 @@ test "ArgsTuple forwarding" {
     }
 }
 
-/// TODO: https://github.com/ziglang/zig/issues/425
+/// Returns the optional value of the declaration `name` in the root source file, casts it to type `T`.
+/// This function should only be called at compile time.
 pub fn globalOption(comptime name: []const u8, comptime T: type) ?T {
-    if (!@hasDecl(root, name))
-        return null;
-    return @as(T, @field(root, name));
+    return comptime blk: {
+        if (!@hasDecl(root, name))
+            break :blk null;
+        break :blk @as(T, @field(root, name));
+    };
 }
 
 /// Returns whether `error_union` contains an error.