diff --git a/add_path.sh b/add_path.sh
index 71257aa77..bfc27bb49 100644
--- a/add_path.sh
+++ b/add_path.sh
@@ -9,6 +9,7 @@
 if [ -z ${IDF_PATH} ]; then
 	echo "IDF_PATH must be set before including this script."
 else
+	IDF_ADD_PATHS_EXTRAS=
 	IDF_ADD_PATHS_EXTRAS="${IDF_ADD_PATHS_EXTRAS}:${IDF_PATH}/components/esptool_py/esptool"
 	IDF_ADD_PATHS_EXTRAS="${IDF_ADD_PATHS_EXTRAS}:${IDF_PATH}/components/espcoredump"
 	IDF_ADD_PATHS_EXTRAS="${IDF_ADD_PATHS_EXTRAS}:${IDF_PATH}/components/partition_table/"