diff --git a/pkg/kube/ready.go b/pkg/kube/ready.go
index 872f81b72..c6906050f 100644
--- a/pkg/kube/ready.go
+++ b/pkg/kube/ready.go
@@ -290,7 +290,7 @@ func (c *ReadyChecker) deploymentReady(rs *appsv1.ReplicaSet, dep *appsv1.Deploy
 	}
 	// Verify the generation observed by the deployment controller matches the spec generation
 	if dep.Status.ObservedGeneration != dep.ObjectMeta.Generation {
-		c.log("Deployment is not ready: %s/%s. observedGeneration (%s) does not match spec generation (%s).", dep.Namespace, dep.Name, dep.Status.ObservedGeneration, dep.ObjectMeta.Generation)
+		c.log("Deployment is not ready: %s/%s. observedGeneration (%d) does not match spec generation (%d).", dep.Namespace, dep.Name, dep.Status.ObservedGeneration, dep.ObjectMeta.Generation)
 		return false
 	}