diff --git a/lib/compiler/std-docs.zig b/lib/compiler/std-docs.zig
index 78816f93481f1fd2fc47b2e3c2764b1e6e28702d..74a9c65849c821967dbbd4c959c2026d090e63b9 100644
--- a/lib/compiler/std-docs.zig
+++ b/lib/compiler/std-docs.zig
@@ -229,6 +229,7 @@ fn serveSourcesTar(request: *std.http.Server.Request, context: *Context) !void {
 
     // intentionally omitting the pointless trailer
     //try archiver.finish();
+    try response_writer.new_interface.flush();
     try response.end();
 }