diff --git a/demo/image_classification/preprocess.sh b/demo/image_classification/preprocess.sh
index fe89c8f4bb..dfe3eb95d1 100755
--- a/demo/image_classification/preprocess.sh
+++ b/demo/image_classification/preprocess.sh
@@ -14,8 +14,6 @@
 # limitations under the License.
 set -e
 
-export PYTHONPATH=$PYTHONPATH:../../
-
 data_dir=./data/cifar-out
 
 python preprocess.py -i $data_dir -s 32 -c 1