diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/components/CraftUseCooldownComponent.java b/src/main/java/org/bukkit/craftbukkit/inventory/components/CraftUseCooldownComponent.java
index 4ff2a1113..e3d947b7b 100644
--- a/src/main/java/org/bukkit/craftbukkit/inventory/components/CraftUseCooldownComponent.java
+++ b/src/main/java/org/bukkit/craftbukkit/inventory/components/CraftUseCooldownComponent.java
@@ -38,7 +38,7 @@ public final class CraftUseCooldownComponent implements UseCooldownComponent {
         Map<String, Object> result = new LinkedHashMap<>();
         result.put("seconds", getCooldownSeconds());
         if (getCooldownGroup() != null) {
-            result.put("cooldown-group", getCooldownGroup());
+            result.put("cooldown-group", getCooldownGroup().toString());
         }
 
         return result;