diff --git a/docs/changelog.rst b/docs/changelog.rst
index 76df434cea..90a3233b34 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -23,6 +23,7 @@ CHANGELOG
 
 **Bug fixes**
 
+- Fix UI bug when customizing intervention map style (#3800)
 - Fix Aggregator fails when updating Tour steps order (#3793)
 - Fix services list display error (refs ##3795)
 
diff --git a/geotrek/maintenance/static/maintenance/main.js b/geotrek/maintenance/static/maintenance/main.js
index 44c5414e25..7444366dea 100644
--- a/geotrek/maintenance/static/maintenance/main.js
+++ b/geotrek/maintenance/static/maintenance/main.js
@@ -10,10 +10,13 @@ $(window).on('entity:map', function (e, data) {
     var map = data.map;
 
     // Show infrastructure layer in application maps
-	var layer = new L.ObjectsLayer(null, {
-		modelname: modelname,
-		style: L.Util.extend(window.SETTINGS.map.styles[modelname] || {}, { clickable:false }),
-	});
+    var style = L.Util.extend({ clickable: false },
+        window.SETTINGS.map.styles[modelname] || {});
+
+    var layer = new L.ObjectsLayer(null, {
+        modelname: modelname,
+        style: style,
+    });
 
     if (data.modelname != modelname){
 	    map.layerscontrol.addOverlay(layer, tr('Intervention'), tr('Maintenance'));