diff --git a/wise-webapp/src/main/java/com/wisemapping/service/MindmapServiceImpl.java b/wise-webapp/src/main/java/com/wisemapping/service/MindmapServiceImpl.java
index ddcfc403..c5d5307f 100755
--- a/wise-webapp/src/main/java/com/wisemapping/service/MindmapServiceImpl.java
+++ b/wise-webapp/src/main/java/com/wisemapping/service/MindmapServiceImpl.java
@@ -113,7 +113,7 @@ public class MindmapServiceImpl
         }
 
         if (!xml.startsWith("<map") || !xml.endsWith("</map>")) {
-            throw new WiseMappingException("Map seems not to be a valid mindmap:"+xml);
+            throw new WiseMappingException("Map seems not to be a valid mindmap: '"+xml +"'");
         }
 
         mindmapManager.updateMindmap(mindMap, saveHistory);