diff --git a/src/pathfinder/yapf/yapf_rail.cpp b/src/pathfinder/yapf/yapf_rail.cpp
--- a/src/pathfinder/yapf/yapf_rail.cpp
+++ b/src/pathfinder/yapf/yapf_rail.cpp
@@ -16,7 +16,7 @@
 #include "yapf_node_rail.hpp"
 #include "yapf_costrail.hpp"
 #include "yapf_destrail.hpp"
-#include "../../functions.h"
+#include "../../viewport_func.h"
 
 #define DEBUG_YAPF_CACHE 0