diff --git a/errors.go b/errors.go
new file mode 100644
index 0000000..9fdf11f
--- /dev/null
+++ b/errors.go
@@ -0,0 +1,10 @@
+package htmlescape
+
+import (
+	"sourcecode.social/reiver/go-erorr"
+)
+
+const (
+	errInternalError = erorr.Error("htmlescape: internal error")
+	errNotUTF8       = erorr.Error("htmlespcape: not UTF-8")
+)