diff --git a/src/fr/neatmonster/nocheatplus/checks/AsyncCheckData.java b/src/fr/neatmonster/nocheatplus/checks/AsyncCheckData.java
index 457f7404..deec480e 100644
--- a/src/fr/neatmonster/nocheatplus/checks/AsyncCheckData.java
+++ b/src/fr/neatmonster/nocheatplus/checks/AsyncCheckData.java
@@ -9,7 +9,7 @@ import java.util.Map;
  * @author mc_dev
  *
  */
-public class AsyncCheckData extends ACheckData {
+public abstract class AsyncCheckData extends ACheckData {
 
 	// TODO: consider using a PermissionEntry class with a timestamp to schedule renewing it.