diff --git a/kumascript/macros/warning.ejs b/kumascript/macros/warning.ejs
index 1ab1277a704a..906034859a43 100644
--- a/kumascript/macros/warning.ejs
+++ b/kumascript/macros/warning.ejs
@@ -1,5 +1,9 @@
 <%
 
+// Throw a MacroDeprecatedError flaw
+// Can be removed when its usage translated-content is down to 0
+mdn.deprecated();
+
 var s_warning = mdn.localString({
     "en-US": "Warning:",
     "de": "Achtung:",