--- a/src/format.h	Sat Feb 18 02:02:29 2017 +0200
+++ b/src/format.h	Mon Feb 20 07:56:21 2017 +0200
@@ -21,6 +21,7 @@
 #include <QGenericMatrix>
 #include "basics.h"
 #include "colors.h"
+#include "types/matrix.h"
 
 // Converts a given value into a string that can be retrieved with text().
 // Used as the argument type to the formatting functions, hence its name.