diff --git a/src/state.cpp b/src/state.cpp
index 004cec1a..d75feea6 100644
--- a/src/state.cpp
+++ b/src/state.cpp
@@ -1,5 +1,7 @@
 #include "state.hpp"
 
+#include "func_create_ff.hpp"
+
 #include "make_unique.hpp"
 
 State state;