diff --git a/src/main/java/de/ids_mannheim/korap/resource/rewrite/CollectionRewrite.java b/src/main/java/de/ids_mannheim/korap/resource/rewrite/CollectionRewrite.java
index 6a7bff3..189cdd5 100644
--- a/src/main/java/de/ids_mannheim/korap/resource/rewrite/CollectionRewrite.java
+++ b/src/main/java/de/ids_mannheim/korap/resource/rewrite/CollectionRewrite.java
@@ -46,7 +46,8 @@
                 && node.at("/key").asText().equals("availability")) {
             String queryAvailability = node.at("/value").asText();
             String matchOp = node.at("/match").asText();
-            if (!userAvailabilities.contains(queryAvailability)){
+            if (userAvailabilities.contains(queryAvailability) && matchOp.
+                    equals(KoralMatchOperator.EQUALS.toString())){
                 userAvailabilities.remove(queryAvailability);
             }
         }