diff --git a/src/internal/godebugs/table.go b/src/internal/godebugs/table.go
index f4262b6695..4c084635fb 100644
--- a/src/internal/godebugs/table.go
+++ b/src/internal/godebugs/table.go
@@ -36,7 +36,7 @@ var All = []Info{
 	{Name: "http2server", Package: "net/http"},
 	{Name: "httplaxcontentlength", Package: "net/http", Changed: 22, Old: "1"},
 	{Name: "httpmuxgo121", Package: "net/http", Changed: 22, Old: "1"},
-	{Name: "httpservecontentkeepheaders", Package: "net/http", Changed: 23, Old: "0"},
+	{Name: "httpservecontentkeepheaders", Package: "net/http", Changed: 23, Old: "1"},
 	{Name: "installgoroot", Package: "go/build"},
 	{Name: "jstmpllitinterp", Package: "html/template", Opaque: true}, // bug #66217: remove Opaque
 	//{Name: "multipartfiles", Package: "mime/multipart"},