diff --git a/pkg/product/mke/phase/install_msr3.go b/pkg/product/mke/phase/install_msr3.go
index 412ada13..bb4537ac 100644
--- a/pkg/product/mke/phase/install_msr3.go
+++ b/pkg/product/mke/phase/install_msr3.go
@@ -154,7 +154,7 @@ func (p *InstallOrUpgradeMSR3) Run() error {
 
 	// Configure Nginx.DNSNames if a LoadBalancerURL is specified.
 	if p.Config.Spec.MSR.V3.ShouldConfigureLB() {
-		if err := unstructured.SetNestedField(msr.Object, []string{"nginx", "localhost", p.Config.Spec.MSR.V3.LoadBalancerURL}, "spec", "nginx", "dnsNames"); err != nil {
+		if err := unstructured.SetNestedStringSlice(msr.Object, []string{"nginx", "localhost", p.Config.Spec.MSR.V3.LoadBalancerURL}, "spec", "nginx", "dnsNames"); err != nil {
 			return fmt.Errorf("failed to set MSR spec.nginx.dnsNames to include LoadBalancerURL: %q: %w", p.Config.Spec.MSR.V3.LoadBalancerURL, err)
 		}
 	}