diff --git a/libc-test/build.rs b/libc-test/build.rs
index ccfd12e4a8b52..d05c8d6ee4df4 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -2015,7 +2015,7 @@ fn test_freebsd(target: &str) {
             // This was changed to 96(0x60) in FreeBSD 13:
             // https://github.com/freebsd/freebsd/
             // commit/06b00ceaa914a3907e4e27bad924f44612bae1d7
-            "MINCORE_SUPER" if Some(13) == freebsd_ver => true,
+            "MINCORE_SUPER" if Some(13) <= freebsd_ver => true,
 
             // Added in FreeBSD 12.0
             "EINTEGRITY" if Some(11) == freebsd_ver => true,
@@ -2063,6 +2063,9 @@ fn test_freebsd(target: &str) {
             // Added in in FreeBSD 13.0 (r367776 and r367287)
             "SCM_CREDS2" | "LOCAL_CREDS_PERSISTENT" if Some(13) > freebsd_ver => true,
 
+            // Added in FreeBSD 14
+            "SPACECTL_DEALLOC" if Some(14) > freebsd_ver => true,
+
             "VM_TOTAL" if Some(11) == freebsd_ver => true,
 
             // Added in FreeBSD 14.
@@ -2140,6 +2143,9 @@ fn test_freebsd(target: &str) {
             // `ptrace_sc_ret` is not available in FreeBSD 11
             "ptrace_sc_ret" if Some(11) == freebsd_ver => true,
 
+            // `spacectl_range` was introduced in FreeBSD 14
+            "spacectl_range" if Some(14) > freebsd_ver => true,
+
             // obsolete version
             "vmtotal" if Some(11) == freebsd_ver => true,
 
@@ -2162,6 +2168,9 @@ fn test_freebsd(target: &str) {
             // `ssize_t` in FreeBSD11:
             "aio_waitcomplete" if Some(10) == freebsd_ver => true,
 
+            // `fspacectl` was introduced in FreeBSD 14
+            "fspacectl" if Some(14) > freebsd_ver => true,
+
             // The `uname` function in the `utsname.h` FreeBSD header is a C
             // inline function (has no symbol) that calls the `__xuname` symbol.
             // Therefore the function pointer comparison does not make sense for it.
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index fe17a9b123927..acb1ea801bb70 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -715,6 +715,11 @@ s_no_extra_traits! {
         pub devname: [::c_char; SPECNAMELEN as usize + 1],
     }
 
+    pub struct spacectl_range {
+        r_offset: ::off_t,
+        r_len: ::off_t
+    }
+
     #[cfg(libc_union)]
     pub union __c_anonymous_elf32_auxv_union {
         pub a_val: ::c_int,
@@ -1098,6 +1103,28 @@ cfg_if! {
             }
         }
 
+        impl ::fmt::Debug for spacectl_range {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                f.debug_struct("spacectl_range")
+                    .field("r_offset", &self.r_offset)
+                    .field("r_len", &self.r_len)
+                    .finish()
+            }
+        }
+        impl ::hash::Hash for spacectl_range {
+            fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
+                self.r_offset.hash(state);
+                self.r_len.hash(state);
+            }
+        }
+        impl Eq for spacectl_range {}
+        impl PartialEq for spacectl_range {
+            fn eq(&self, other: &Self) -> bool {
+                self.r_offset == other.r_offset
+                    && self.r_len == other.r_len
+            }
+        }
+
         #[cfg(libc_union)]
         impl PartialEq for __c_anonymous_elf32_auxv_union {
             fn eq(&self, other: &__c_anonymous_elf32_auxv_union) -> bool {
@@ -2662,6 +2689,9 @@ pub const F_SEAL_SEAL: ::c_int = 1;
 pub const F_SEAL_SHRINK: ::c_int = 2;
 pub const F_SEAL_WRITE: ::c_int = 8;
 
+// for use with fspacectl
+pub const SPACECTL_DEALLOC: ::c_int = 1;
+
 // For getrandom()
 pub const GRND_NONBLOCK: ::c_uint = 0x1;
 pub const GRND_RANDOM: ::c_uint = 0x2;
@@ -3326,6 +3356,14 @@ extern "C" {
         nbytes: ::size_t,
     ) -> ::ssize_t;
 
+    pub fn fspacectl(
+        fd: ::c_int,
+        cmd: ::c_int,
+        rqsr: *const spacectl_range,
+        flags: ::c_int,
+        rmsr: *mut spacectl_range,
+    ) -> ::c_int;
+
     pub fn jail(jail: *mut ::jail) -> ::c_int;
     pub fn jail_attach(jid: ::c_int) -> ::c_int;
     pub fn jail_remove(jid: ::c_int) -> ::c_int;