diff --git a/errors.go b/errors.go
new file mode 100644
index 0000000..49d6415
--- /dev/null
+++ b/errors.go
@@ -0,0 +1,9 @@
+package netln
+
+import (
+	"github.com/reiver/go-fck"
+)
+
+const (
+	errRuneError = fck.Error("rune error")
+)