diff --git a/sys/sys/capsicum.h b/sys/sys/capsicum.h
index 8502a967498a..fe4910e0c65c 100644
--- a/sys/sys/capsicum.h
+++ b/sys/sys/capsicum.h
@@ -1,5 +1,5 @@
 /*-
- * Copyright (c) 2008-2010 Robert N. M. Watson
+ * Copyright (c) 2008-2010, 2015 Robert N. M. Watson
  * Copyright (c) 2012 FreeBSD Foundation
  * All rights reserved.
  *
@@ -398,13 +398,13 @@ int __cap_rights_get(int version, int fd, cap_rights_t *rights);
 /*
  * Limits allowed ioctls for the given descriptor.
  */
-int cap_ioctls_limit(int fd, const unsigned long *cmds, size_t ncmds);
+int cap_ioctls_limit(int fd, const cap_ioctl_t *cmds, size_t ncmds);
 /*
  * Returns array of allowed ioctls for the given descriptor.
  * If all ioctls are allowed, the cmds array is not populated and
  * the function returns CAP_IOCTLS_ALL.
  */
-ssize_t cap_ioctls_get(int fd, unsigned long *cmds, size_t maxcmds);
+ssize_t cap_ioctls_get(int fd, cap_ioctl_t *cmds, size_t maxcmds);
 /*
  * Limits allowed fcntls for the given descriptor (CAP_FCNTL_*).
  */
diff --git a/sys/sys/types.h b/sys/sys/types.h
index 03eaa6002ef6..c2930f5a2f18 100644
--- a/sys/sys/types.h
+++ b/sys/sys/types.h
@@ -232,6 +232,11 @@ typedef	__useconds_t	useconds_t;	/* microseconds (unsigned) */
 #define	_USECONDS_T_DECLARED
 #endif
 
+#ifndef _CAP_IOCTL_T_DECLARED
+#define	_CAP_IOCTL_T_DECLARED
+typedef	unsigned long	cap_ioctl_t;
+#endif
+
 #ifndef _CAP_RIGHTS_T_DECLARED
 #define	_CAP_RIGHTS_T_DECLARED
 struct cap_rights;