diff --git a/pkg/controller/operators/olm/operator.go b/pkg/controller/operators/olm/operator.go
index 954b712b040..1d8021fa44a 100644
--- a/pkg/controller/operators/olm/operator.go
+++ b/pkg/controller/operators/olm/operator.go
@@ -1423,9 +1423,9 @@ func (a *Operator) ensureDeploymentAnnotations(logger *logrus.Entry, csv *v1alph
 		return nil
 	}
 
-	var depNames []string
+	depNames := make(map[string]struct{})
 	for _, dep := range strategyDetailsDeployment.DeploymentSpecs {
-		depNames = append(depNames, dep.Name)
+		depNames[dep.Name] = struct{}{}
 	}
 	existingDeployments, err := a.lister.AppsV1().DeploymentLister().Deployments(csv.GetNamespace()).List(labels.Everything())
 	if err != nil {
@@ -1435,7 +1435,9 @@ func (a *Operator) ensureDeploymentAnnotations(logger *logrus.Entry, csv *v1alph
 	// compare deployments to see if any need to be created/updated
 	existingMap := map[string]*appsv1.Deployment{}
 	for _, d := range existingDeployments {
-		existingMap[d.GetName()] = d
+		if _, ok := depNames[d.GetName()]; ok {
+			existingMap[d.GetName()] = d
+		}
 	}
 	updateErrs := []error{}
 	for _, dep := range existingMap {