diff -r 7c27cda03747 -r 97df974b5ed5 src/linetypes/triangle.h
--- a/src/linetypes/triangle.h	Fri Mar 06 23:45:44 2020 +0200
+++ b/src/linetypes/triangle.h	Mon Mar 09 14:21:54 2020 +0200
@@ -1,3 +1,4 @@
+#pragma once
 #include "object.h"
 
 namespace ldraw