diff --git a/pkg/controller/certificates/controller.go b/pkg/controller/certificates/controller.go
index bdc596cde..4c6b19336 100644
--- a/pkg/controller/certificates/controller.go
+++ b/pkg/controller/certificates/controller.go
@@ -18,7 +18,6 @@ package certificates
 
 import (
 	"context"
-	"sync"
 
 	k8sErrors "k8s.io/apimachinery/pkg/api/errors"
 	corelisters "k8s.io/client-go/listers/core/v1"
@@ -46,7 +45,6 @@ type Controller struct {
 	secretLister        corelisters.SecretLister
 
 	scheduledWorkQueue scheduler.ScheduledWorkQueue
-	workerWg           sync.WaitGroup
 	metrics            *metrics.Metrics
 
 	// used for testing
diff --git a/pkg/controller/ingress-shim/controller.go b/pkg/controller/ingress-shim/controller.go
index 9b0b1e506..604ca95e5 100644
--- a/pkg/controller/ingress-shim/controller.go
+++ b/pkg/controller/ingress-shim/controller.go
@@ -19,7 +19,6 @@ package controller
 import (
 	"context"
 	"fmt"
-	"sync"
 
 	k8sErrors "k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/util/runtime"
@@ -60,7 +59,6 @@ type Controller struct {
 	issuerLister        cmlisters.IssuerLister
 	clusterIssuerLister cmlisters.ClusterIssuerLister
 
-	workerWg sync.WaitGroup
 	defaults defaults
 }