diff --git a/source/java/org/alfresco/cmis/mapping/CMISServicesImpl.java b/source/java/org/alfresco/cmis/mapping/CMISServicesImpl.java
index 312d035e55..44e3e19ede 100644
--- a/source/java/org/alfresco/cmis/mapping/CMISServicesImpl.java
+++ b/source/java/org/alfresco/cmis/mapping/CMISServicesImpl.java
@@ -890,7 +890,7 @@ public class CMISServicesImpl implements CMISServices, ApplicationContextAware,
                 || updatability == CMISUpdatabilityEnum.READ_AND_WRITE_WHEN_CHECKED_OUT
                 && !nodeService.hasAspect(nodeRef, ContentModel.ASPECT_WORKING_COPY))
         {
-            throw new CMISConstraintException("Unable to update read-only property" + propertyName);
+            throw new CMISConstraintException("Unable to update read-only property " + propertyName);
         }
 
         if (propDef.isRequired() && value == null)