diff --git a/libc-test/build.rs b/libc-test/build.rs
index 2f7c469d7cf6a..b1760c4ae4d0b 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -374,6 +374,7 @@ fn test_apple(target: &str) {
             ("vnode_info_path", "vip_path") => true,
             ("ifreq", "ifr_ifru") => true,
             ("ifkpi", "ifk_data") => true,
+            ("ifconf", "ifc_ifcu") => true,
             _ => false,
         }
     });
diff --git a/libc-test/semver/apple.txt b/libc-test/semver/apple.txt
index 98dcc4d4cdf1e..fcf4eb4b6743e 100644
--- a/libc-test/semver/apple.txt
+++ b/libc-test/semver/apple.txt
@@ -1957,6 +1957,7 @@ if_freenameindex
 if_msghdr
 if_nameindex
 ifaddrs
+ifconf
 ifkpi
 ifreq
 image_offset
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 10885dfa877e8..ef9cf2f1f034c 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -1129,6 +1129,15 @@ s! {
         pub validattr: attribute_set_t,
         pub nativeattr: attribute_set_t,
     }
+
+    #[cfg_attr(libc_packedN, repr(packed(4)))]
+    pub struct ifconf {
+        pub ifc_len: ::c_int,
+        #[cfg(libc_union)]
+        pub ifc_ifcu: __c_anonymous_ifc_ifcu,
+        #[cfg(not(libc_union))]
+        pub ifc_ifcu: *mut ifreq,
+    }
 }
 
 s_no_extra_traits! {
@@ -1467,6 +1476,12 @@ s_no_extra_traits! {
         #[cfg(not(libc_union))]
         pub ifr_ifru: ::sockaddr,
     }
+
+    #[cfg(libc_union)]
+    pub union __c_anonymous_ifc_ifcu {
+        pub ifcu_buf: *mut ::c_char,
+        pub ifcu_req: *mut ifreq,
+    }
 }
 
 impl siginfo_t {
@@ -3000,6 +3015,37 @@ cfg_if! {
                 self.ifr_ifru.hash(state);
             }
         }
+
+        #[cfg(libc_union)]
+        impl Eq for __c_anonymous_ifc_ifcu {}
+
+        #[cfg(libc_union)]
+        impl PartialEq for __c_anonymous_ifc_ifcu {
+            fn eq(&self, other: &__c_anonymous_ifc_ifcu) -> bool {
+                unsafe {
+                    self.ifcu_buf == other.ifcu_buf &&
+                    self.ifcu_req == other.ifcu_req
+                }
+            }
+        }
+
+        #[cfg(libc_union)]
+        impl ::fmt::Debug for __c_anonymous_ifc_ifcu {
+            fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
+                f.debug_struct("ifc_ifcu")
+                    .field("ifcu_buf", unsafe { &self.ifcu_buf })
+                    .field("ifcu_req", unsafe { &self.ifcu_req })
+                    .finish()
+            }
+        }
+
+        #[cfg(libc_union)]
+        impl ::hash::Hash for __c_anonymous_ifc_ifcu {
+            fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
+                unsafe { self.ifcu_buf.hash(state) };
+                unsafe { self.ifcu_req.hash(state) };
+            }
+        }
     }
 }
 
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index 0f19a09ff4609..5fba1447d7baf 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -967,6 +967,8 @@ s! {
         pub ifc_len: ::c_int,
         #[cfg(libc_union)]
         pub ifc_ifcu: __c_anonymous_ifc_ifcu,
+        #[cfg(not(libc_union))]
+        pub ifc_ifcu: *mut ifreq,
     }
 
     pub struct au_mask_t {