diff --git a/src/move.test.c b/src/move.test.c
index 1f2916ca5..de5df0ab9 100644
--- a/src/move.test.c
+++ b/src/move.test.c
@@ -349,7 +349,7 @@ static void test_follow_ship_msg(CuTest * tc) {
     locale_setstring(default_locale, "keyword::move", "NACH");
     init_locale(default_locale);
 
-    mt_register(mt_new_va("error18", "unit:unit", "region:region", "command:order"));
+    mt_register(mt_new_va("error18", "unit:unit", "region:region", "command:order", 0));
 
     init_order(ord);
     getstrtoken();