diff --git a/system/locker.go b/system/locker.go
index eab2a15..b7937e5 100644
--- a/system/locker.go
+++ b/system/locker.go
@@ -51,7 +51,9 @@ func (l *Locker) TryAcquire(ctx context.Context) error {
 		return nil
 	case <-ctx.Done():
 		if err := ctx.Err(); err != nil {
-			return err
+			if errors.Is(err, context.DeadlineExceeded) || errors.Is(err, context.Canceled) {
+				return ErrLockerLocked
+			}
 		}
 		return nil
 	}