diff --git a/deferrwl.go b/deferrwl.go
index 48bb0b50d2..bf95be244f 100644
--- a/deferrwl.go
+++ b/deferrwl.go
@@ -1,10 +1,12 @@
 package torrent
 
+import "github.com/anacrolix/sync"
+
 // Runs deferred actions on Unlock. Note that actions are assumed to be the results of changes that
 // would only occur with a write lock at present. The race detector should catch instances of defers
 // without the write lock being held.
 type lockWithDeferreds struct {
-	internal      mu //sync.RWMutex
+	internal      sync.RWMutex
 	unlockActions []func()
 }
 
diff --git a/peer.go b/peer.go
index 6bfda7958b..da353d7ce6 100644
--- a/peer.go
+++ b/peer.go
@@ -28,7 +28,7 @@ type (
 	Peer struct {
 		// First to ensure 64-bit alignment for atomics. See #262.
 		_stats ConnStats
-		mu     sync.RWMutex
+		mu     mu //sync.RWMutex
 
 		t *Torrent