diff --git a/controllers/bucket_controller.go b/controllers/bucket_controller.go
index 0a93ce11..71360dd7 100644
--- a/controllers/bucket_controller.go
+++ b/controllers/bucket_controller.go
@@ -383,8 +383,8 @@ func (r *BucketReconciler) notify(ctx context.Context, oldObj, newObj *sourcev1.
 	// failure.
 	if resErr == nil && res == sreconcile.ResultSuccess && newObj.Status.Artifact != nil {
 		annotations := map[string]string{
-			sourcev1.GroupVersion.Group + "/revision": newObj.Status.Artifact.Revision,
-			sourcev1.GroupVersion.Group + "/checksum": newObj.Status.Artifact.Checksum,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
 		}
 
 		var oldChecksum string
diff --git a/controllers/gitrepository_controller.go b/controllers/gitrepository_controller.go
index a41f9ba0..997f4022 100644
--- a/controllers/gitrepository_controller.go
+++ b/controllers/gitrepository_controller.go
@@ -295,8 +295,8 @@ func (r *GitRepositoryReconciler) notify(ctx context.Context, oldObj, newObj *so
 	// and recovery from any failure.
 	if r.shouldNotify(oldObj, newObj, res, resErr) {
 		annotations := map[string]string{
-			sourcev1.GroupVersion.Group + "/revision": newObj.Status.Artifact.Revision,
-			sourcev1.GroupVersion.Group + "/checksum": newObj.Status.Artifact.Checksum,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
 		}
 
 		var oldChecksum string
diff --git a/controllers/helmchart_controller.go b/controllers/helmchart_controller.go
index e1b9dc7f..c6a57692 100644
--- a/controllers/helmchart_controller.go
+++ b/controllers/helmchart_controller.go
@@ -308,8 +308,8 @@ func (r *HelmChartReconciler) notify(ctx context.Context, oldObj, newObj *source
 	// failure.
 	if resErr == nil && res == sreconcile.ResultSuccess && newObj.Status.Artifact != nil {
 		annotations := map[string]string{
-			sourcev1.GroupVersion.Group + "/revision": newObj.Status.Artifact.Revision,
-			sourcev1.GroupVersion.Group + "/checksum": newObj.Status.Artifact.Checksum,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
 		}
 
 		var oldChecksum string
diff --git a/controllers/helmrepository_controller.go b/controllers/helmrepository_controller.go
index deb176ff..4a1e89ff 100644
--- a/controllers/helmrepository_controller.go
+++ b/controllers/helmrepository_controller.go
@@ -268,8 +268,8 @@ func (r *HelmRepositoryReconciler) notify(ctx context.Context, oldObj, newObj *s
 	// failure.
 	if resErr == nil && res == sreconcile.ResultSuccess && newObj.Status.Artifact != nil {
 		annotations := map[string]string{
-			sourcev1.GroupVersion.Group + "/revision": newObj.Status.Artifact.Revision,
-			sourcev1.GroupVersion.Group + "/checksum": newObj.Status.Artifact.Checksum,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
 		}
 
 		humanReadableSize := "unknown size"
diff --git a/controllers/ocirepository_controller.go b/controllers/ocirepository_controller.go
index 599bc094..c0160a31 100644
--- a/controllers/ocirepository_controller.go
+++ b/controllers/ocirepository_controller.go
@@ -1098,8 +1098,8 @@ func (r *OCIRepositoryReconciler) notify(ctx context.Context, oldObj, newObj *so
 	// failure.
 	if resErr == nil && res == sreconcile.ResultSuccess && newObj.Status.Artifact != nil {
 		annotations := map[string]string{
-			sourcev1.GroupVersion.Group + "/revision": newObj.Status.Artifact.Revision,
-			sourcev1.GroupVersion.Group + "/checksum": newObj.Status.Artifact.Checksum,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaRevisionKey): newObj.Status.Artifact.Revision,
+			fmt.Sprintf("%s/%s", sourcev1.GroupVersion.Group, eventv1.MetaChecksumKey): newObj.Status.Artifact.Checksum,
 		}
 
 		var oldChecksum string