diff --git a/rest/src/main/groovy/whelk/rest/api/SearchUtils2.java b/rest/src/main/groovy/whelk/rest/api/SearchUtils2.java
index 6bf3941cae..7235404090 100644
--- a/rest/src/main/groovy/whelk/rest/api/SearchUtils2.java
+++ b/rest/src/main/groovy/whelk/rest/api/SearchUtils2.java
@@ -68,7 +68,7 @@ Map<String, Object> doSearch(Map<String, String[]> queryParameters) throws Inval
 
         Map<String, Object> partialCollectionView = getPartialCollectionView(queryRes, qTree, queryParams, appParams);
 
-        if (!queryParams.debug.contains(QueryParams.Debug.ES_QUERY)) {
+        if (queryParams.debug.contains(QueryParams.Debug.ES_QUERY)) {
             partialCollectionView.put(QueryParams.ApiParams.DEBUG, Map.of(QueryParams.Debug.ES_QUERY, esQueryDsl));
         }