diff --git a/src/net/http/serve_test.go b/src/net/http/serve_test.go
index 6394da3bb7..bfac783e3a 100644
--- a/src/net/http/serve_test.go
+++ b/src/net/http/serve_test.go
@@ -6189,6 +6189,7 @@ func TestUnsupportedTransferEncodingsReturn501(t *testing.T) {
 		"fugazi",
 		"foo-bar",
 		"unknown",
+		"\rchunked",
 	}
 
 	for _, badTE := range unsupportedTEs {
diff --git a/src/net/http/transfer.go b/src/net/http/transfer.go
index 85c2e5a360..3894007d30 100644
--- a/src/net/http/transfer.go
+++ b/src/net/http/transfer.go
@@ -639,7 +639,7 @@ func (t *transferReader) parseTransferEncoding() error {
 	if len(raw) != 1 {
 		return &unsupportedTEError{fmt.Sprintf("too many transfer encodings: %q", raw)}
 	}
-	if !ascii.EqualFold(textproto.TrimString(raw[0]), "chunked") {
+	if !ascii.EqualFold(raw[0], "chunked") {
 		return &unsupportedTEError{fmt.Sprintf("unsupported transfer encoding: %q", raw[0])}
 	}