diff --git a/controller/dataplane/konnect_extension.go b/controller/dataplane/konnect_extension.go
index 14190cc7c..6365c037b 100644
--- a/controller/dataplane/konnect_extension.go
+++ b/controller/dataplane/konnect_extension.go
@@ -19,8 +19,11 @@ import (
 )
 
 var (
-	ErrCrossNamespaceReference    = errors.New("cross-namespace reference is not currently supported for Konnect extensions")
-	ErrKonnectExtensionNotFound   = errors.New("konnect extension not found")
+	// ErrCrossNamespaceReference is returned when a Konnect extension references a different namespace.
+	ErrCrossNamespaceReference = errors.New("cross-namespace reference is not currently supported for Konnect extensions")
+	// ErrKonnectExtensionNotFound is returned when a Konnect extension is not found.
+	ErrKonnectExtensionNotFound = errors.New("konnect extension not found")
+	// ErrClusterCertificateNotFound is returned when a cluster certificate secret referenced in the KonnectExtension is not found.
 	ErrClusterCertificateNotFound = errors.New("cluster certificate not found")
 )