diff --git a/frontend-js/src/main/js/gui/admin/EditProjectDialog.js b/frontend-js/src/main/js/gui/admin/EditProjectDialog.js
index e58edeb518727cd207c37c18e529d9499849ed02..48302bde7f5e869b45a5431a2b8c4c20bf7415ba 100644
--- a/frontend-js/src/main/js/gui/admin/EditProjectDialog.js
+++ b/frontend-js/src/main/js/gui/admin/EditProjectDialog.js
@@ -574,6 +574,7 @@ EditProjectDialog.prototype.refresh = function () {
     var configuration = self.getConfiguration();
     var mapCanvasTypes = configuration.getMapCanvasTypes();
     var select = $("[name='project-map-canvas-type']", self.getElement())[0];
+    $(select).empty();
     var licenceCheckbox = $("[name='project-google-maps-license']", self.getElement())[0];
     var licenceDiv = licenceCheckbox.parentElement.parentElement;