diff --git a/sys/sys/_types.h b/sys/sys/_types.h
index 3ea24c474969..f8884c6b8a6c 100644
--- a/sys/sys/_types.h
+++ b/sys/sys/_types.h
@@ -49,8 +49,10 @@ typedef	__int32_t	__pid_t;	/* process [group] */
 typedef	__int64_t	__rlim_t;	/* resource limit (XXX not unsigned) */
 typedef	__uint8_t	__sa_family_t;
 typedef	__uint32_t	__socklen_t;
+typedef	long		__suseconds_t;	/* microseconds (signed) */
 typedef	__int32_t	__timer_t;	/* timer_gettime()... */
 typedef	__uint32_t	__uid_t;
+typedef	unsigned int	__useconds_t;	/* microseconds (unsigned) */
 
 /*
  * Unusual type definitions.
diff --git a/sys/sys/types.h b/sys/sys/types.h
index c952a78f26b7..14daf6a884f3 100644
--- a/sys/sys/types.h
+++ b/sys/sys/types.h
@@ -174,6 +174,12 @@ typedef	__rlim_t	rlim_t;		/* resource limit */
 #endif
 
 typedef	__segsz_t	segsz_t;	/* segment size (in pages) */
+
+#ifndef _SUSECONDS_T_DECLARED
+typedef	__suseconds_t	suseconds_t;	/* microseconds (signed) */
+#define	_SUSECONDS_T_DECLARED
+#endif
+
 typedef	__u_register_t	u_register_t;
 
 #ifndef _UID_T_DECLARED
@@ -181,6 +187,11 @@ typedef	__uid_t		uid_t;		/* user id */
 #define	_UID_T_DECLARED
 #endif
 
+#ifndef _USECONDS_T_DECLARED
+typedef	__useconds_t	useconds_t;	/* microseconds (unsigned) */
+#define	_USECONDS_T_DECLARED
+#endif
+
 typedef	__vm_offset_t	vm_offset_t;
 typedef	__vm_ooffset_t	vm_ooffset_t;
 typedef	__vm_pindex_t	vm_pindex_t;