diff --git a/build.zig b/build.zig
index 1473fcbf3ca51a317e00346e95c2b60988879e0c..9d60863bd4a20e29f004f9c0b282abed8a2387ad 100644
--- a/build.zig
+++ b/build.zig
@@ -43,6 +43,7 @@ pub fn build(b: *Builder) !void {
     ) catch unreachable;
     const docgen_cmd = docgen_exe.run();
     docgen_cmd.addArgs(&[_][]const u8{
+        "--zig",
         rel_zig_exe,
         "doc" ++ fs.path.sep_str ++ "langref.html.in",
         langref_out_path,