diff --git a/src/s/bsdos2-1.h b/src/s/bsdos2-1.h
new file mode 100644
index 00000000000..7a8b6630d02
--- /dev/null
+++ b/src/s/bsdos2-1.h
@@ -0,0 +1,6 @@
+/* s/ file for BSDI BSD/OS 2.1 system.  */
+
+#include "bsdos2.h"
+
+#undef LIB_X11_LIB
+#define LIB_X11_LIB -L/usr/X11/lib -lX11 -lipc
diff --git a/src/s/bsdos2.h b/src/s/bsdos2.h
new file mode 100644
index 00000000000..c3c477c4d98
--- /dev/null
+++ b/src/s/bsdos2.h
@@ -0,0 +1,8 @@
+/* s/ file for BSDI BSD/OS 2.0 system.  */
+
+#include "bsd386.h"
+
+#define	TEXT_START	0x1020	/* for QMAGIC */
+#define	START_FILES	pre-crt0.o /usr/lib/crt0.o
+#define	HAVE_TERMIOS
+#define	NO_TERMIO