diff --git a/src/html/template/context.go b/src/html/template/context.go
index 45be3a6a9f..7ab3d1fed6 100644
--- a/src/html/template/context.go
+++ b/src/html/template/context.go
@@ -48,19 +48,19 @@ func (c context) mangle(templateName string) string {
 		return templateName
 	}
 	s := templateName + "$htmltemplate_" + c.state.String()
-	if c.delim != 0 {
+	if c.delim != delimNone {
 		s += "_" + c.delim.String()
 	}
-	if c.urlPart != 0 {
+	if c.urlPart != urlPartNone {
 		s += "_" + c.urlPart.String()
 	}
-	if c.jsCtx != 0 {
+	if c.jsCtx != jsCtxRegexp {
 		s += "_" + c.jsCtx.String()
 	}
-	if c.attr != 0 {
+	if c.attr != attrNone {
 		s += "_" + c.attr.String()
 	}
-	if c.element != 0 {
+	if c.element != elementNone {
 		s += "_" + c.element.String()
 	}
 	return s