diff --git a/src/crypto/x509/root_ios_gen.go b/src/crypto/x509/root_ios_gen.go
index 05bd672d..3c98de5 100644
--- a/src/crypto/x509/root_ios_gen.go
+++ b/src/crypto/x509/root_ios_gen.go
@@ -164,8 +164,8 @@
 const header = `// Code generated by root_ios_gen.go -version %s; DO NOT EDIT.
 // Update the version in root.go and regenerate with "go generate".
 
-// +build ios
-// +build !x509omitbundledroots
+//go:build ios && !x509omitbundledroots
+// +build ios,!x509omitbundledroots
 
 package x509