diff --git a/src/backend/game/game.cpp b/src/backend/game/game.cpp
index d317723e..92e39857 100644
--- a/src/backend/game/game.cpp
+++ b/src/backend/game/game.cpp
@@ -28,6 +28,7 @@
 #include "../error.h"
 
 #include <thread>
+#include <cmath>
 
 #include <boost/algorithm/string.hpp>
 #include <boost/locale.hpp>