diff --git a/vlib/builtin/js/array.v b/vlib/builtin/js/array.v
index bc341fa235..90640e4a8f 100644
--- a/vlib/builtin/js/array.v
+++ b/vlib/builtin/js/array.v
@@ -126,7 +126,7 @@ pub fn (b []byte) hex() string {
 	return 'sdf'
 }
 
-pub fn (arr mut array) _push_many(val voidptr, size int) {
+pub fn (arr mut array) push_many(val voidptr, size int) {
 }
 
 pub fn free(voidptr) {
diff --git a/vlib/strings/builder_js.v b/vlib/strings/builder_js.v
index 10d68d2c9c..b26ca5e4ec 100644
--- a/vlib/strings/builder_js.v
+++ b/vlib/strings/builder_js.v
@@ -18,13 +18,13 @@ pub fn new_builder(initial_size int) Builder {
 }
 
 pub fn (b mut Builder) write(s string) {
-	b.buf._push_many(s.str, s.len)
+	b.buf.push_many(s.str, s.len)
 	//b.buf << []byte(s)  // TODO
 	b.len += s.len
 }
 
 pub fn (b mut Builder) writeln(s string) {
-	b.buf._push_many(s.str, s.len)
+	b.buf.push_many(s.str, s.len)
 	//b.buf << []byte(s)  // TODO
 	b.buf << `\n`
 	b.len += s.len + 1