diff --git a/language/fuzz.go b/language/fuzz.go
new file mode 100644
index 00000000..b485e3c9
--- /dev/null
+++ b/language/fuzz.go
@@ -0,0 +1,13 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build gofuzz
+// +build gofuzz
+
+package language
+
+func FuzzAcceptLanguage(data []byte) int {
+	_, _, _ = ParseAcceptLanguage(string(data))
+	return 1
+}