diff --git a/python/tmc_classes.py b/python/tmc_classes.py
index e7c8829..b9b196b 100644
--- a/python/tmc_classes.py
+++ b/python/tmc_classes.py
@@ -671,7 +671,7 @@ class tmc_dict:
                         color="gray"
                     if message.location.has_koord:
                         if loc==None:#first message at this location
-                            map_tag+='<h3 style="padding: 0px;margin: 0px;">'
+                            map_tag+='<h3 title="lcn:%i" style="padding: 0px;margin: 0px;">'%message.location.lcn
                             map_tag+=message.location_text()
                             map_tag+='</h3>'
                             if message.cancellation_time==None: