diff --git a/src/os/os2/os2.cpp b/src/os/os2/os2.cpp
--- a/src/os/os2/os2.cpp
+++ b/src/os/os2/os2.cpp
@@ -30,6 +30,8 @@
 	#include <dos.h>
 #endif
 
+#include "../../safeguards.h"
+
 #define INCL_WIN
 #define INCL_WINCLIPBOARD