diff --git a/src/main/resources/run-docker-container.sh b/src/main/resources/run-docker-container.sh
index 8d9393b..2326d8c 100755
--- a/src/main/resources/run-docker-container.sh
+++ b/src/main/resources/run-docker-container.sh
@@ -19,7 +19,7 @@ exec java \
     -Ds3proxy.encrypted-blobstore="${S3PROXY_ENCRYPTED_BLOBSTORE}" \
     -Ds3proxy.encrypted-blobstore-password="${S3PROXY_ENCRYPTED_BLOBSTORE_PASSWORD}" \
     -Ds3proxy.encrypted-blobstore-salt="${S3PROXY_ENCRYPTED_BLOBSTORE_SALT}" \
-    -Ds3proxy.v4-max-non-chunked-request-size="${S3PROXY_V4_MAX_NON_CHUNKED_REQ_SIZE}" \
+    -Ds3proxy.v4-max-non-chunked-request-size="${S3PROXY_V4_MAX_NON_CHUNKED_REQ_SIZE:-33554432}" \
     -Djclouds.provider="${JCLOUDS_PROVIDER}" \
     -Djclouds.identity="${JCLOUDS_IDENTITY}" \
     -Djclouds.credential="${JCLOUDS_CREDENTIAL}" \