diff --git a/pkg/operator/ceph/cluster/mgr/mgr.go b/pkg/operator/ceph/cluster/mgr/mgr.go
index 6c1ac5b2cd02..aa55ef0dedd5 100644
--- a/pkg/operator/ceph/cluster/mgr/mgr.go
+++ b/pkg/operator/ceph/cluster/mgr/mgr.go
@@ -530,6 +530,10 @@ func (c *Cluster) EnableServiceMonitor() error {
 	if c.spec.External.Enable {
 		serviceMonitor.Spec.Endpoints[0].Port = controller.ServiceExternalMetricName
 	}
+	if c.spec.Monitoring.Interval != nil {
+		duration := c.spec.Monitoring.Interval.Duration.String()
+		serviceMonitor.Spec.Endpoints[0].Interval = monitoringv1.Duration(duration)
+	}
 	err := c.clusterInfo.OwnerInfo.SetControllerReference(serviceMonitor)
 	if err != nil {
 		return errors.Wrapf(err, "failed to set owner reference to service monitor %q", serviceMonitor.Name)
diff --git a/pkg/operator/k8sutil/prometheus_test.go b/pkg/operator/k8sutil/prometheus_test.go
index b2166138270d..6802896c597a 100644
--- a/pkg/operator/k8sutil/prometheus_test.go
+++ b/pkg/operator/k8sutil/prometheus_test.go
@@ -18,19 +18,21 @@ limitations under the License.
 package k8sutil
 
 import (
-	"testing"
-
+	monitoringv1 "github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring/v1"
 	"github.com/stretchr/testify/assert"
+	"testing"
 )
 
 func TestGetServiceMonitor(t *testing.T) {
 	name := "rook-ceph-mgr"
 	namespace := "rook-ceph"
 	port := "http-metrics"
+	interval := monitoringv1.Duration("5s")
 	servicemonitor := GetServiceMonitor(name, namespace, port)
 	assert.Equal(t, name, servicemonitor.GetName())
 	assert.Equal(t, namespace, servicemonitor.GetNamespace())
 	assert.Equal(t, port, servicemonitor.Spec.Endpoints[0].Port)
+	assert.Equal(t, interval, servicemonitor.Spec.Endpoints[0].Interval)
 	assert.NotNil(t, servicemonitor.GetLabels())
 	assert.NotNil(t, servicemonitor.Spec.NamespaceSelector.MatchNames)
 	assert.NotNil(t, servicemonitor.Spec.Selector.MatchLabels)