diff --git a/pkg/daemon/discover/discover.go b/pkg/daemon/discover/discover.go
index 942574810..2fe2fa6ee 100644
--- a/pkg/daemon/discover/discover.go
+++ b/pkg/daemon/discover/discover.go
@@ -42,7 +42,7 @@ import (
 )
 
 const (
-	discoverDaemonUdev = "DISCOVER_DAEMON_UDEV_BLACKLIST"
+	DiscoverDaemonUdev = "DISCOVER_DAEMON_UDEV_BLACKLIST"
 )
 
 var (
@@ -200,7 +200,7 @@ func udevBlockMonitor(c chan struct{}, period time.Duration) {
 	// get discoverDaemonUdevBlacklist from the environment variable
 	// if user doesn't provide any regex; generate the default regex
 	// else use the regex provided by user
-	discoverUdev := os.Getenv(discoverDaemonUdev)
+	discoverUdev := os.Getenv(DiscoverDaemonUdev)
 	if discoverUdev == "" {
 		discoverUdev = "(?i)dm-[0-9]+,(?i)rbd[0-9]+,(?i)nbd[0-9]+"
 	}
diff --git a/pkg/operator/discover/discover.go b/pkg/operator/discover/discover.go
index 1981fc8f1..05e82b184 100644
--- a/pkg/operator/discover/discover.go
+++ b/pkg/operator/discover/discover.go
@@ -148,6 +148,7 @@ func (d *Discover) createDiscoverDaemonSet(ctx context.Context, namespace, disco
 								k8sutil.NamespaceEnvVar(),
 								k8sutil.NodeEnvVar(),
 								k8sutil.NameEnvVar(),
+								{Name: discoverDaemon.DiscoverDaemonUdev, Value: os.Getenv(discoverDaemon.DiscoverDaemonUdev)},
 							},
 						},
 					},
diff --git a/pkg/operator/discover/discover_test.go b/pkg/operator/discover/discover_test.go
index ec19cc16e..a95e59bcd 100644
--- a/pkg/operator/discover/discover_test.go
+++ b/pkg/operator/discover/discover_test.go
@@ -80,7 +80,7 @@ func TestStartDiscoveryDaemonset(t *testing.T) {
 	volumeMounts := agentDS.Spec.Template.Spec.Containers[0].VolumeMounts
 	assert.Equal(t, 3, len(volumeMounts))
 	envs := agentDS.Spec.Template.Spec.Containers[0].Env
-	assert.Equal(t, 3, len(envs))
+	assert.Equal(t, 4, len(envs))
 	image := agentDS.Spec.Template.Spec.Containers[0].Image
 	assert.Equal(t, "rook/rook:myversion", image)
 	assert.Nil(t, agentDS.Spec.Template.Spec.Tolerations)