diff --git a/library/std/src/lib.rs b/library/std/src/lib.rs
index 0797585e3df..c330e87e0b8 100644
--- a/library/std/src/lib.rs
+++ b/library/std/src/lib.rs
@@ -239,6 +239,7 @@
 #![feature(const_cstr_unchecked)]
 #![feature(const_fn_transmute)]
 #![feature(const_raw_ptr_deref)]
+#![feature(const_ipv4)]
 #![feature(container_error_extra)]
 #![feature(core_intrinsics)]
 #![feature(custom_test_frameworks)]
diff --git a/library/std/src/net/ip.rs b/library/std/src/net/ip.rs
index c37323b1bc4..ecaef11ef5a 100644
--- a/library/std/src/net/ip.rs
+++ b/library/std/src/net/ip.rs
@@ -361,7 +361,7 @@ impl Ipv4Addr {
     /// let addr = Ipv4Addr::new(127, 0, 0, 1);
     /// assert_eq!(addr.octets(), [127, 0, 0, 1]);
     /// ```
-    #[rustc_const_stable(feature = "const_ipv4", since = "1.48.0")]
+    #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
     #[stable(feature = "rust1", since = "1.0.0")]
     pub const fn octets(&self) -> [u8; 4] {
         // This returns the order we want because s_addr is stored in big-endian.
@@ -405,7 +405,7 @@ impl Ipv4Addr {
     /// assert_eq!(Ipv4Addr::new(127, 0, 0, 1).is_loopback(), true);
     /// assert_eq!(Ipv4Addr::new(45, 22, 13, 197).is_loopback(), false);
     /// ```
-    #[rustc_const_stable(feature = "const_ipv4", since = "1.48.0")]
+    #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
     #[stable(since = "1.7.0", feature = "ip_17")]
     pub const fn is_loopback(&self) -> bool {
         self.octets()[0] == 127
@@ -435,7 +435,7 @@ impl Ipv4Addr {
     /// assert_eq!(Ipv4Addr::new(192, 168, 0, 2).is_private(), true);
     /// assert_eq!(Ipv4Addr::new(192, 169, 0, 2).is_private(), false);
     /// ```
-    #[rustc_const_stable(feature = "const_ipv4", since = "1.48.0")]
+    #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
     #[stable(since = "1.7.0", feature = "ip_17")]
     pub const fn is_private(&self) -> bool {
         match self.octets() {
@@ -462,7 +462,7 @@ impl Ipv4Addr {
     /// assert_eq!(Ipv4Addr::new(169, 254, 10, 65).is_link_local(), true);
     /// assert_eq!(Ipv4Addr::new(16, 89, 10, 65).is_link_local(), false);
     /// ```
-    #[rustc_const_stable(feature = "const_ipv4", since = "1.48.0")]
+    #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
     #[stable(since = "1.7.0", feature = "ip_17")]
     pub const fn is_link_local(&self) -> bool {
         match self.octets() {
@@ -577,7 +577,7 @@ impl Ipv4Addr {
     /// assert_eq!(Ipv4Addr::new(100, 127, 255, 255).is_shared(), true);
     /// assert_eq!(Ipv4Addr::new(100, 128, 0, 0).is_shared(), false);
     /// ```
-    #[rustc_const_stable(feature = "const_ipv4", since = "1.48.0")]
+    #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
     pub const fn is_shared(&self) -> bool {
         self.octets()[0] == 100 && (self.octets()[1] & 0b1100_0000 == 0b0100_0000)
     }
@@ -610,7 +610,7 @@ impl Ipv4Addr {
     /// assert_eq!(Ipv4Addr::new(192, 0, 1, 0).is_ietf_protocol_assignment(), false);
     /// assert_eq!(Ipv4Addr::new(191, 255, 255, 255).is_ietf_protocol_assignment(), false);
     /// ```
-    #[rustc_const_stable(feature = "const_ipv4", since = "1.48.0")]
+    #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
     pub const fn is_ietf_protocol_assignment(&self) -> bool {
         self.octets()[0] == 192 && self.octets()[1] == 0 && self.octets()[2] == 0
     }
@@ -634,7 +634,7 @@ impl Ipv4Addr {
     /// assert_eq!(Ipv4Addr::new(198, 19, 255, 255).is_benchmarking(), true);
     /// assert_eq!(Ipv4Addr::new(198, 20, 0, 0).is_benchmarking(), false);
     /// ```
-    #[rustc_const_stable(feature = "const_ipv4", since = "1.48.0")]
+    #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
     pub const fn is_benchmarking(&self) -> bool {
         self.octets()[0] == 198 && (self.octets()[1] & 0xfe) == 18
     }
@@ -688,7 +688,7 @@ impl Ipv4Addr {
     /// assert_eq!(Ipv4Addr::new(236, 168, 10, 65).is_multicast(), true);
     /// assert_eq!(Ipv4Addr::new(172, 16, 10, 65).is_multicast(), false);
     /// ```
-    #[rustc_const_stable(feature = "const_ipv4", since = "1.48.0")]
+    #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
     #[stable(since = "1.7.0", feature = "ip_17")]
     pub const fn is_multicast(&self) -> bool {
         self.octets()[0] >= 224 && self.octets()[0] <= 239
@@ -735,7 +735,7 @@ impl Ipv4Addr {
     /// assert_eq!(Ipv4Addr::new(203, 0, 113, 6).is_documentation(), true);
     /// assert_eq!(Ipv4Addr::new(193, 34, 17, 19).is_documentation(), false);
     /// ```
-    #[rustc_const_stable(feature = "const_ipv4", since = "1.48.0")]
+    #[rustc_const_unstable(feature = "const_ipv4", issue = "76205")]
     #[stable(since = "1.7.0", feature = "ip_17")]
     pub const fn is_documentation(&self) -> bool {
         match self.octets() {