diff --git a/app/cross_compare_worker.py b/app/cross_compare_worker.py
index 4e42653..aea5f51 100644
--- a/app/cross_compare_worker.py
+++ b/app/cross_compare_worker.py
@@ -533,7 +533,7 @@ def query_cross_survey_pngs(params):
     existed_jobs_list = db_tmnet.query_cross_survey_job(crossid, area_id)
     cross_png_res = {}
     for src_dir in road_src_dict:
-        cross_png_res[src_dir] = wave_cross_survey_result[src_dir]
+        cross_png_res[src_dir] = wave_cross_survey_result[src_dir] if src_dir in wave_cross_survey_result else ''
     if not existed_jobs_list:
         res = make_common_res(0, 'ok')
         res['data'] = cross_png_res