diff --git a/pkg/apis/certmanager/v1alpha2/types.go b/pkg/apis/certmanager/v1alpha2/types.go
index 977b7dc76..f47571481 100644
--- a/pkg/apis/certmanager/v1alpha2/types.go
+++ b/pkg/apis/certmanager/v1alpha2/types.go
@@ -42,14 +42,10 @@ const (
 	// if the challenge type is set to http01
 	IngressACMEIssuerHTTP01IngressClassAnnotationKey = "acme.cert-manager.io/http01-ingress-class"
 
-	IngressClassAnnotationKey = IngressKey
-)
-
-const (
-	// IngressKey picks a specific "class" for the Ingress.
-	// The controller only processes Ingresses with this annotation either
-	// unset, or set to either the configured value or the empty string.
-	IngressKey = "kubernetes.io/ingress.class"
+	// IngessClassAnnotationKey picks a specific "class" for the Ingress. The
+	// controller only processes Ingresses with this annotation either unset, or
+	// set to either the configured value or the empty string.
+	IngressClassAnnotationKey = "kubernetes.io/ingress.class"
 )
 
 // Annotation names for CertificateRequests
diff --git a/pkg/issuer/acme/http/ingress.go b/pkg/issuer/acme/http/ingress.go
index 6b3ac1cad..847622aa8 100644
--- a/pkg/issuer/acme/http/ingress.go
+++ b/pkg/issuer/acme/http/ingress.go
@@ -130,7 +130,7 @@ func buildIngressResource(ch *cmacme.Challenge, svcName string) (*extv1beta1.Ing
 	ingAnnotations["nginx.ingress.kubernetes.io/whitelist-source-range"] = "0.0.0.0/0,::/0"
 
 	if ingClass != nil {
-		ingAnnotations[cmapi.IngressKey] = *ingClass
+		ingAnnotations[cmapi.IngressClassAnnotationKey] = *ingClass
 	}
 
 	ingPathToAdd := ingressPath(ch.Spec.Token, svcName)