diff --git a/source/glest_game/graphics/renderer.cpp b/source/glest_game/graphics/renderer.cpp
index c29f8b775..2f484f14c 100644
--- a/source/glest_game/graphics/renderer.cpp
+++ b/source/glest_game/graphics/renderer.cpp
@@ -24,7 +24,7 @@
 #include "opengl.h"
 #include "faction.h"
 #include "factory_repository.h"
-//#include <cmath>
+#include <cmath>
 
 #include "leak_dumper.h"
 
diff --git a/source/glest_game/type_instances/unit.cpp b/source/glest_game/type_instances/unit.cpp
index d9951135e..45d175cb2 100644
--- a/source/glest_game/type_instances/unit.cpp
+++ b/source/glest_game/type_instances/unit.cpp
@@ -23,7 +23,7 @@
 #include "skill_type.h"
 #include "core_data.h"
 #include "renderer.h"
-//#include <cmath>
+#include <cmath>
 #include "socket.h"
 
 #include "leak_dumper.h"