diff --git a/file/lib/data/suspension/SuspensionAction.class.php b/file/lib/data/suspension/SuspensionAction.class.php
index b0bf7e6..abdc935 100644
--- a/file/lib/data/suspension/SuspensionAction.class.php
+++ b/file/lib/data/suspension/SuspensionAction.class.php
@@ -30,6 +30,7 @@ public function validateRevoke() {
 	 * Revokes suspensions.
 	 */
 	public function revoke() {
+		// TODO: ignore revokes if suspension already is revoked
 		if (!isset($this->parameters['revoker'])) {
 			$this->parameters['revoker'] = null;
 		}