diff --git a/sys/mips/include/cdefs.h b/sys/mips/include/cdefs.h
new file mode 100644
index 000000000000..c45cefd54cbc
--- /dev/null
+++ b/sys/mips/include/cdefs.h
@@ -0,0 +1,54 @@
+/*	$NetBSD: cdefs.h,v 1.12 2006/08/27 19:04:30 matt Exp $	*/
+
+/*
+ * Copyright (c) 1995 Carnegie-Mellon University.
+ * All rights reserved.
+ *
+ * Author: Chris G. Demetriou
+ *
+ * Permission to use, copy, modify and distribute this software and
+ * its documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
+ * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie the
+ * rights to redistribute these changes.
+ */
+
+#ifndef _MIPS_CDEFS_H_
+#define	_MIPS_CDEFS_H_
+
+/*      MIPS Subprogram Interface Model */
+#define _MIPS_SIM_ABIX32	4	/* 64 bit safe, ILP32 o32 model */
+#define _MIPS_SIM_ABI64		3
+#define _MIPS_SIM_NABI32	2	/* 64bit safe, ILP32 n32 model */
+#define _MIPS_SIM_ABI32		1
+
+#define _MIPS_BSD_API_LP32	_MIPS_SIM_ABI32
+#define	_MIPS_BSD_API_LP32_64CLEAN	_MIPS_SIM_ABIX32
+#define	_MIPS_BSD_API_N32	_MIPS_SIM_NABI32
+#define	_MIPS_BSD_API_LP64	_MIPS_SIM_ABI64
+
+#if defined(__mips_n64)
+#define	_MIPS_BSD_API		_MIPS_BSD_API_LP64
+#elif defined(__mips_n32)
+#define	_MIPS_BSD_API		_MIPS_BSD_API_N32
+#elif defined(__mips_o64)
+#define	_MIPS_BSD_API		_MIPS_BSD_API_LP32_64CLEAN
+#else
+#define	_MIPS_BSD_API		_MIPS_BSD_API_LP32
+#endif
+
+#endif /* !_MIPS_CDEFS_H_ */