diff --git a/src/net/http/cookie.go b/src/net/http/cookie.go
index 7d02796f3062a..fd8c71c645cd9 100644
--- a/src/net/http/cookie.go
+++ b/src/net/http/cookie.go
@@ -173,7 +173,7 @@ func (c *Cookie) String() string {
 	const extraCookieLength = 110
 	var b strings.Builder
 	b.Grow(len(c.Name) + len(c.Value) + len(c.Domain) + len(c.Path) + extraCookieLength)
-	b.WriteString(sanitizeCookieName(c.Name))
+	b.WriteString(c.Name)
 	b.WriteRune('=')
 	b.WriteString(sanitizeCookieValue(c.Value))
 
diff --git a/src/net/http/cookie_test.go b/src/net/http/cookie_test.go
index 9536a69c20ca3..bfaea46f8ca40 100644
--- a/src/net/http/cookie_test.go
+++ b/src/net/http/cookie_test.go
@@ -127,6 +127,22 @@ var writeSetCookiesTests = []struct {
 		&Cookie{Name: "\t"},
 		``,
 	},
+	{
+		&Cookie{Name: "\r"},
+		``,
+	},
+	{
+		&Cookie{Name: "a\nb", Value: "v"},
+		``,
+	},
+	{
+		&Cookie{Name: "a\nb", Value: "v"},
+		``,
+	},
+	{
+		&Cookie{Name: "a\rb", Value: "v"},
+		``,
+	},
 }
 
 func TestWriteSetCookies(t *testing.T) {