diff --git a/headers/os/locale/Catalog.h b/headers/os/locale/Catalog.h
index ce8324dc74..48c1440137 100644
--- a/headers/os/locale/Catalog.h
+++ b/headers/os/locale/Catalog.h
@@ -443,8 +443,9 @@ BCatalogAddOn::Next()
 }
 
 inline const char *
-BCatalogAddOn::MarkForTranslation(const char *str, const char *ctx,
-	const char *cmt)
+BCatalogAddOn::MarkForTranslation(const char *str,
+	const char * /*ctx __attribute__ ((unused))*/,
+	const char * /*cmt __attribute__ ((unused))*/)
 {
 	return str;
 }