diff --git a/Jenkinsfile b/Jenkinsfile
index d12a6f3ab586b9c529d858235e9f56b262b3565c..7cdb566cac9a958eb4fba607a389a1260f6e9b7d 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -246,7 +246,7 @@ pipeline {
                                 docker run --rm -t --privileged \
                                   -v "$WORKSPACE/bundles:/go/src/github.com/docker/docker/bundles" \
                                   --name docker-pr$BUILD_NUMBER \
-                                  -e DOCKER_EXPERIMENTAL=y \
+                                  -e DOCKER_EXPERIMENTAL=1 \
                                   -e DOCKER_GITCOMMIT=${GIT_COMMIT} \
                                   -e DOCKER_GRAPHDRIVER \
                                   docker:${GIT_COMMIT}-exp \
diff --git a/hack/ci/experimental b/hack/ci/experimental
index 9ccbc8425f699996fb127607acbef6a6ec12430a..10297c7dc92091757cfe6cf4b34751af137d4190 100755
--- a/hack/ci/experimental
+++ b/hack/ci/experimental
@@ -2,7 +2,7 @@
 # Entrypoint for jenkins experimental CI
 set -eu -o pipefail
 
-export DOCKER_EXPERIMENTAL=y
+export DOCKER_EXPERIMENTAL=1
 
 hack/make.sh \
 	binary-daemon \