diff --git a/subprojects/json-lib-core/src/main/java/org/kordamp/json/JsonConfig.java b/subprojects/json-lib-core/src/main/java/org/kordamp/json/JsonConfig.java
index 3053005..8934258 100644
--- a/subprojects/json-lib-core/src/main/java/org/kordamp/json/JsonConfig.java
+++ b/subprojects/json-lib-core/src/main/java/org/kordamp/json/JsonConfig.java
@@ -547,7 +547,7 @@ public void setCollectionType(Class collectionType) {
             }
             this.collectionType = collectionType;
         } else {
-            collectionType = DEFAULT_COLLECTION_TYPE;
+            this.collectionType = DEFAULT_COLLECTION_TYPE;
         }
     }