diff --git a/pkg/cluster/k8sres.go b/pkg/cluster/k8sres.go
index e05a54553..b676c0e26 100644
--- a/pkg/cluster/k8sres.go
+++ b/pkg/cluster/k8sres.go
@@ -2221,8 +2221,8 @@ func (c *Cluster) generatePrimaryPodDisruptionBudget() *policyv1.PodDisruptionBu
 	pdbEnabled := c.OpConfig.EnablePodDisruptionBudget
 	pdbMasterLabelSelector := c.OpConfig.PDBMasterLabelSelector
 
-	// if PodDisruptionBudget is disabled or if there are no DB pods, set the budget to 0.
-	if (pdbEnabled != nil && !(*pdbEnabled)) || c.Spec.NumberOfInstances <= 0 {
+	// if PodDisruptionBudget is disabled or if there are more than one DB pods, set the budget to 0.
+	if (pdbEnabled != nil && !(*pdbEnabled)) || c.Spec.NumberOfInstances <= 1 {
 		minAvailable = intstr.FromInt(0)
 	}