diff --git a/reactos/include/crt/dos.h b/reactos/include/crt/dos.h
index b95dc73280b..294e8fe1b49 100644
--- a/reactos/include/crt/dos.h
+++ b/reactos/include/crt/dos.h
@@ -39,8 +39,8 @@ extern "C" {
 #endif
 
 #if (defined(_X86_) && !defined(__x86_64))
-//  void __cdecl _disable(void);
-//  void __cdecl _enable(void);
+  void __cdecl _disable(void);
+  void __cdecl _enable(void);
 #endif
 
 #ifndef	NO_OLDNAMES