diff --git a/core/os/os_js.odin b/core/os/os_js.odin
index ba65aa073..f2563f217 100644
--- a/core/os/os_js.odin
+++ b/core/os/os_js.odin
@@ -1,4 +1,4 @@
-//+js
 package os
+// +build js
 
 #panic("package os does not support a js target")
\ No newline at end of file