diff --git a/components/app_update/otatool.py b/components/app_update/otatool.py
index 0e9d40046a..7ed48d1108 100755
--- a/components/app_update/otatool.py
+++ b/components/app_update/otatool.py
@@ -102,7 +102,6 @@ class OtatoolTarget():
     def switch_ota_partition(self, ota_id):
         self._check_otadata_partition()
 
-        sys.path.append(PARTTOOL_DIR)
         import gen_esp32part as gen
 
         def is_otadata_info_valid(status):