diff --git a/ihatemoney/web.py b/ihatemoney/web.py
index c0afab91..458aa4a5 100644
--- a/ihatemoney/web.py
+++ b/ihatemoney/web.py
@@ -413,6 +413,7 @@ def edit_project():
 
     # Edit form
     if edit_form.validate_on_submit():
+        old_currency = g.project.default_currency
         project = edit_form.update(g.project)
 
         db.session.add(project)