diff --git a/codex/node.nim b/codex/node.nim
index 20643632..7438d214 100644
--- a/codex/node.nim
+++ b/codex/node.nim
@@ -558,7 +558,7 @@ proc onProve(
 
   logScope:
     cid = cidStr
-    slot = slot
+    slot = slotIdx
     challenge = challenge
 
   trace "Received proof challenge"