diff --git a/sys/sys/_callout.h b/sys/sys/_callout.h
--- a/sys/sys/_callout.h
+++ b/sys/sys/_callout.h
@@ -40,6 +40,7 @@
 #ifndef _SYS__CALLOUT_H
 #define	_SYS__CALLOUT_H
 
+#include <sys/_types.h>
 #include <sys/queue.h>
 
 struct lock_object;
@@ -56,8 +57,8 @@
 		SLIST_ENTRY(callout) sle;
 		TAILQ_ENTRY(callout) tqe;
 	} c_links;
-	sbintime_t c_time;			/* ticks to the event */
-	sbintime_t c_precision;			/* delta allowed wrt opt */
+	__sbintime_t c_time;			/* ticks to the event */
+	__sbintime_t c_precision;		/* delta allowed wrt opt */
 	void	*c_arg;				/* function argument */
 	callout_func_t *c_func;			/* function to call */
 	struct lock_object *c_lock;		/* lock to handle */
diff --git a/sys/sys/_types.h b/sys/sys/_types.h
--- a/sys/sys/_types.h
+++ b/sys/sys/_types.h
@@ -133,6 +133,7 @@
 typedef	__int64_t	__off_t;	/* file offset */
 typedef	__int64_t	__off64_t;	/* file offset (alias) */
 typedef	__int32_t	__pid_t;	/* process [group] */
+typedef	__int64_t	__sbintime_t;
 typedef	__int64_t	__rlim_t;	/* resource limit - intentionally */
 					/* signed, because of legacy code */
 					/* that uses -1 for RLIM_INFINITY */
diff --git a/sys/sys/types.h b/sys/sys/types.h
--- a/sys/sys/types.h
+++ b/sys/sys/types.h
@@ -193,7 +193,7 @@
 #define	_RLIM_T_DECLARED
 #endif
 
-typedef	__int64_t	sbintime_t;
+typedef	__sbintime_t	sbintime_t;
 
 typedef	__segsz_t	segsz_t;	/* segment size (in pages) */