diff -r a26568aa3cce -r 96cb15a7611f src/toolsets/algorithmtoolset.cpp
--- a/src/toolsets/algorithmtoolset.cpp	Tue Feb 14 14:59:26 2017 +0200
+++ b/src/toolsets/algorithmtoolset.cpp	Tue Feb 14 15:11:33 2017 +0200
@@ -36,6 +36,7 @@
 #include "../linetypes/conditionaledge.h"
 #include "../linetypes/edgeline.h"
 #include "../linetypes/empty.h"
+#include "../linetypes/triangle.h"
 #include "ui_replcoords.h"
 #include "ui_editraw.h"
 #include "ui_flip.h"