diff --git a/script/get-preprocessed-dataset-imagenet/run.bat b/script/get-preprocessed-dataset-imagenet/run.bat
index bdeca68fd..3ee17691b 100644
--- a/script/get-preprocessed-dataset-imagenet/run.bat
+++ b/script/get-preprocessed-dataset-imagenet/run.bat
@@ -1,4 +1,4 @@
 @echo off
 
-%MLC_PYTHON_BIN% %MLC_TMP_CURRENT_SCRIPT_PATH%\preprocess.py
+"%MLC_PYTHON_BIN%" "%MLC_TMP_CURRENT_SCRIPT_PATH%\preprocess.py"
 IF %ERRORLEVEL% NEQ 0 EXIT %ERRORLEVEL%
diff --git a/script/get-preprocessed-dataset-imagenet/run.sh b/script/get-preprocessed-dataset-imagenet/run.sh
index 04b4b3cff..436b11582 100644
--- a/script/get-preprocessed-dataset-imagenet/run.sh
+++ b/script/get-preprocessed-dataset-imagenet/run.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
-if [ ! -z ${MLC_IMAGENET_PREPROCESSED_PATH+x} ]; then
+if [ ! -z "${MLC_IMAGENET_PREPROCESSED_PATH+x}" ]; then
     exit 0
 fi
-${MLC_PYTHON_BIN_WITH_PATH} ${MLC_TMP_CURRENT_SCRIPT_PATH}/preprocess.py
+"${MLC_PYTHON_BIN_WITH_PATH}" "${MLC_TMP_CURRENT_SCRIPT_PATH}/preprocess.py"
 test $? -eq 0 || exit 1