diff --git a/src/script/api/script_railtypelist.cpp b/src/script/api/script_railtypelist.cpp
--- a/src/script/api/script_railtypelist.cpp
+++ b/src/script/api/script_railtypelist.cpp
@@ -17,7 +17,9 @@
 ScriptRailTypeList::ScriptRailTypeList()
 {
 	EnforceDeityOrCompanyModeValid_Void();
+	bool is_deity = ScriptCompanyMode::IsDeity();
+	CompanyID owner = ScriptObject::GetCompany();
 	for (RailType rt = RAILTYPE_BEGIN; rt != RAILTYPE_END; rt++) {
-		if (ScriptCompanyMode::IsDeity() || ::HasRailTypeAvail(ScriptObject::GetCompany(), rt)) this->AddItem(rt);
+		if (is_deity || ::HasRailTypeAvail(owner, rt)) this->AddItem(rt);
 	}
 }