diff --git a/game/main.cpp b/game/main.cpp
index 1459bd4..87648c9 100644
--- a/game/main.cpp
+++ b/game/main.cpp
@@ -6,6 +6,7 @@
 #include "game_window.h"
 #include "options.hpp"
 
+uint64_t optionsFlags;
 
 using namespace std;
 
diff --git a/game/options.hpp b/game/options.hpp
index 779e32e..8243311 100644
--- a/game/options.hpp
+++ b/game/options.hpp
@@ -9,7 +9,7 @@
 
 #define SET_FLAG(x,y) optionsFlags&=(~((1)<<x));optionsFlags|=((y&1)<<x)
 #define ISSET_FLAG(x) (optionsFlags&((1)<<x))
-uint64_t optionsFlags;
+extern uint64_t optionsFlags;
 
 /*
  * usage: