diff --git a/epdb/legacy_api.py b/epdb/legacy_api.py
index 26e57277..b9a9d491 100644
--- a/epdb/legacy_api.py
+++ b/epdb/legacy_api.py
@@ -2059,7 +2059,7 @@ def add_pathway_edge(request, package_uuid, pathway_uuid, e: Form[CreateEdge]):
             for pr in e.products.split(","):
                 products.append(Node.objects.get(pathway=pw, url=pr.strip()))
 
-        multi_step = None
+        multi_step = False
         if e.multistep and e.multistep.strip() == "true":
             multi_step = True