diff --git a/chain/store/store.go b/chain/store/store.go
index c8ba63527..0b4ff90ad 100644
--- a/chain/store/store.go
+++ b/chain/store/store.go
@@ -693,7 +693,7 @@ func (cs *ChainStore) GetRandomness(ctx context.Context, blks []cid.Cid, tickets
 	}
 	lt := int64(len(tickets))
 	if lb < lt {
-		log.Desugar().Warn("self sampling randomness. this should be extremely rare, if you see this often it may be a bug", zap.Stack("call-stack"))
+		log.Desugar().Warn("self sampling randomness. this should be extremely rare, if you see this often it may be a bug", zap.Stack("stacktrace"))
 
 		t := tickets[lt-(1+lb)]