diff --git a/src/collective/geo/settings/config.py b/src/collective/geo/settings/config.py
index abfa06b..b5b603b 100644
--- a/src/collective/geo/settings/config.py
+++ b/src/collective/geo/settings/config.py
@@ -11,4 +11,5 @@
     'polygoncolor',
     'display_properties',
     'linewidth',
+    'balloonstyle',
 ]
diff --git a/src/collective/geo/settings/interfaces.py b/src/collective/geo/settings/interfaces.py
index fd07952..be1b898 100644
--- a/src/collective/geo/settings/interfaces.py
+++ b/src/collective/geo/settings/interfaces.py
@@ -190,6 +190,13 @@ class IGeoFeatureStyle(Interface):
         default=['Title', 'Description']
     )
 
+    balloonstyle = schema.TextLine(
+        title=_(u"Balloon style"),
+        description=_(u"Text displayed in the balloon."),
+        default=u'<h2>$[name]</h2>$[description]',
+        required=True)
+
+
 
 class IGeoCustomFeatureStyle(IGeoFeatureStyle):
     """IGeoCustomFeatureStyle