diff --git a/api/s2_junctions.py b/api/s2_junctions.py
index b639d62..a4a37db 100644
--- a/api/s2_junctions.py
+++ b/api/s2_junctions.py
@@ -54,8 +54,8 @@ def delete_junction(name: str, id: str) -> ChangeSet:
 
         redo = sql.replace("'", '"')
         undo = f'insert into _node (id, type) values ("{id}", "JUNCTION");'
-        undo += f" insert into junctions (id, elevation, demand, pattern) values ('{id}', {elevation}, {demand}, {pattern});"
-        undo += f"  insert into coordinates (node, coord) values ('{id}', '{coord}');"
+        undo += f' insert into junctions (id, elevation, demand, pattern) values ("{id}", {elevation}, {demand}, {pattern});'
+        undo += f'  insert into coordinates (node, coord) values ("{id}", "{coord}");'
         add_operation(name, redo, undo)
 
     change = ChangeSet()