diff --git a/src/main/java/world/bentobox/bentobox/api/addons/AddonClassLoader.java b/src/main/java/world/bentobox/bentobox/api/addons/AddonClassLoader.java
index 26c66d127..ea42ef5f3 100644
--- a/src/main/java/world/bentobox/bentobox/api/addons/AddonClassLoader.java
+++ b/src/main/java/world/bentobox/bentobox/api/addons/AddonClassLoader.java
@@ -121,7 +121,7 @@ public class AddonClassLoader extends URLClassLoader {
 
         // Either return the value if it exists (and != null), or try to compute one.
         // If the computed value is null, it won't be added to the map.
-        return classes.computeIfAbsent(name, key -> {
+        return classes.computeIfAbsent(name, (key) -> {
             Class<?> computed = checkGlobal ? loader.getClassByName(key) : null;
 
             if (computed == null) {