diff --git a/lib/handlers/compile.js b/lib/handlers/compile.js
index ee79d45bb8e..2afda783e62 100644
--- a/lib/handlers/compile.js
+++ b/lib/handlers/compile.js
@@ -527,7 +527,7 @@ export class CompileHandler {
                     } else {
                         logger.error('Error during compilation: ', {error});
                     }
-                    res.end(JSON.stringify({code: -1, stderr: [{text: error}]}));
+                    res.end(JSON.stringify({code: -1, stdout: [], stderr: [{text: error}]}));
                 },
             );
     }