--- a/src/intro_gui.cpp	Wed Nov 26 01:07:49 2008 +0000
+++ b/src/intro_gui.cpp	Wed Nov 26 13:12:45 2008 +0000
@@ -161,6 +161,8 @@
 		SetDParam(0, STR_OSNAME_OS2);
 #elif defined(SUNOS)
 		SetDParam(0, STR_OSNAME_SUNOS);
+#elif defined(DOS)
+		SetDParam(0, STR_OSNAME_DOS);
 #else
 		SetDParam(0, STR_OSNAME_UNIX);
 #endif