diff --git a/chain/sync.go b/chain/sync.go
index 62dea456b..77c02deff 100644
--- a/chain/sync.go
+++ b/chain/sync.go
@@ -661,7 +661,7 @@ loop:
 			}
 			for _, bc := range b.Cids() {
 				if syncer.bad.Has(bc) {
-					return nil, xerrors.Errorf("(chain contained block marked previously as bad (%s, %s)", from.Cids(), bc)
+					return nil, xerrors.Errorf("chain contained block marked previously as bad (%s, %s)", from.Cids(), bc)
 				}
 			}
 			blockSet = append(blockSet, b)