diff --git a/src/agenda_culturel/extractors.py b/src/agenda_culturel/extractors.py
index 1f0e9ef..4a02380 100644
--- a/src/agenda_culturel/extractors.py
+++ b/src/agenda_culturel/extractors.py
@@ -194,6 +194,8 @@ class ExtractorFacebook(Extractor):
             image = self.get_element("image")
             local_image = None if image is None else Extractor.download_media(image)
 
+            u = urlparse(url)
+            unique_url = u.scheme + "://" + u.netloc + u.path
 
             return Event(title=self.get_element("name"), 
                 status=Event.STATUS.DRAFT,
@@ -206,7 +208,7 @@ class ExtractorFacebook(Extractor):
                 local_image=local_image,
                 image=self.get_element("image"),
                 image_alt=self.get_element("image_alt"),
-                reference_urls=[url])
+                reference_urls=[unique_url])
 
 
     def process_page(txt, url):