diff --git a/src/main/java/org/betonquest/betonquest/events/FolderEvent.java b/src/main/java/org/betonquest/betonquest/events/FolderEvent.java
index 4ea42d80a4..6b3bdd930e 100644
--- a/src/main/java/org/betonquest/betonquest/events/FolderEvent.java
+++ b/src/main/java/org/betonquest/betonquest/events/FolderEvent.java
@@ -55,7 +55,7 @@ public FolderEvent(final Instruction instruction) throws InstructionParseExcepti
         ticks = instruction.hasArgument("ticks");
         minutes = instruction.hasArgument("minutes");
         cancelOnLogout = instruction.hasArgument("cancelOnLogout");
-        cancelled = new ArrayList<>();
+        cancelled = new HashSet<>();
     }
 
     @SuppressWarnings({"PMD.CyclomaticComplexity", "PMD.NPathComplexity", "PMD.CognitiveComplexity"})