diff --git a/rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/classification/SecurityClearanceServiceImpl.java b/rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/classification/SecurityClearanceServiceImpl.java
index dfdec3af08..e5cbd57bfb 100644
--- a/rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/classification/SecurityClearanceServiceImpl.java
+++ b/rm-server/source/java/org/alfresco/module/org_alfresco_module_rm/classification/SecurityClearanceServiceImpl.java
@@ -126,7 +126,7 @@ public class SecurityClearanceServiceImpl extends ServiceBaseImpl implements Sec
         }
         else
         {
-            Map<QName, Serializable> properties = ImmutableMap.of(PROP_CLEARANCE_LEVEL, clearanceId);
+            Map<QName, Serializable> properties = ImmutableMap.of(PROP_CLEARANCE_LEVEL, (Serializable) clearanceId);
             nodeService.addAspect(personNode, ASPECT_SECURITY_CLEARANCE, properties);
         }
     }