Index: head/lib/libcasper/services/cap_sysctl/cap_sysctl.h
===================================================================
--- head/lib/libcasper/services/cap_sysctl/cap_sysctl.h
+++ head/lib/libcasper/services/cap_sysctl/cap_sysctl.h
@@ -55,8 +55,8 @@
 cap_sysctl_limit_t *cap_sysctl_limit_init(cap_channel_t *);
 cap_sysctl_limit_t *cap_sysctl_limit_name(cap_sysctl_limit_t *limit,
     const char *name, int flags);
-cap_sysctl_limit_t *cap_sysctl_limit_mib(cap_sysctl_limit_t *limit, int *mibp,
-    u_int miblen, int flags);
+cap_sysctl_limit_t *cap_sysctl_limit_mib(cap_sysctl_limit_t *limit,
+    const int *mibp, u_int miblen, int flags);
 int cap_sysctl_limit(cap_sysctl_limit_t *limit);
 #else /* !WITH_CASPER */
 #define	cap_sysctl(chan, name, namelen, oldp, oldlenp, newp, newlen)	\
Index: head/lib/libcasper/services/cap_sysctl/cap_sysctl.3
===================================================================
--- head/lib/libcasper/services/cap_sysctl/cap_sysctl.3
+++ head/lib/libcasper/services/cap_sysctl/cap_sysctl.3
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd May 13, 2019
+.Dd April 6, 2020
 .Dt CAP_SYSCTL 3
 .Os
 .Sh NAME
@@ -46,7 +46,7 @@
 .Ft void *
 .Fn cap_sysctl_limit_name "void *limit" "const char *name" "int flags"
 .Ft void *
-.Fn cap_sysctl_limit_mib "void *limit" "int *mibp" "u_int miblen" "int flags"
+.Fn cap_sysctl_limit_mib "void *limit" "const int *mibp" "u_int miblen" "int flags"
 .Ft int
 .Fn cap_sysctl_limit "void *limit"
 .Sh DESCRIPTION
Index: head/lib/libcasper/services/cap_sysctl/cap_sysctl.c
===================================================================
--- head/lib/libcasper/services/cap_sysctl/cap_sysctl.c
+++ head/lib/libcasper/services/cap_sysctl/cap_sysctl.c
@@ -109,7 +109,7 @@
 }
 
 cap_sysctl_limit_t *
-cap_sysctl_limit_mib(cap_sysctl_limit_t *limit, int *mibp, u_int miblen,
+cap_sysctl_limit_mib(cap_sysctl_limit_t *limit, const int *mibp, u_int miblen,
     int flags)
 {
 	nvlist_t *lnv;