diff --git a/pkg/kube/ready.go b/pkg/kube/ready.go
index 744f6f69c..8f18725df 100644
--- a/pkg/kube/ready.go
+++ b/pkg/kube/ready.go
@@ -443,7 +443,7 @@ func (c *ReadyChecker) replicationControllerReady(rc *corev1.ReplicationControll
 func (c *ReadyChecker) replicaSetReady(rs *appsv1.ReplicaSet) bool {
 	// Verify the generation observed by the replicaSet controller matches the spec generation
 	if rs.Status.ObservedGeneration != rs.ObjectMeta.Generation {
-		c.log("ReplicaSet is not ready: %s/%s. observedGeneration (%s) does not match spec generation (%s).", rs.Namespace, rs.Name, rs.Status.ObservedGeneration, rs.ObjectMeta.Generation)
+		c.log("ReplicaSet is not ready: %s/%s. observedGeneration (%d) does not match spec generation (%d).", rs.Namespace, rs.Name, rs.Status.ObservedGeneration, rs.ObjectMeta.Generation)
 		return false
 	}
 	return true