diff --git a/libc-test/build.rs b/libc-test/build.rs
index 649e3699e5ae2..552642fed9f5f 100755
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -2613,6 +2613,10 @@ fn test_linux(target: &str) {
             // Require Linux kernel 5.6:
             "VMADDR_CID_LOCAL" => true,
 
+            // IPPROTO_MAX was increased in 5.6 for IPPROTO_MPTCP:
+            | "IPPROTO_MAX"
+            | "IPPROTO_MPTCP" => true,
+
             // Defined in kernel headers but musl removes it; need musl 1.2 for definition in musl
             // headers.
             "P_PIDFD" => true,
diff --git a/src/unix/linux_like/android/mod.rs b/src/unix/linux_like/android/mod.rs
index 3fbbc98ca7094..1240e208be883 100644
--- a/src/unix/linux_like/android/mod.rs
+++ b/src/unix/linux_like/android/mod.rs
@@ -1025,6 +1025,8 @@ pub const SOCK_SEQPACKET: ::c_int = 5;
 pub const SOCK_DCCP: ::c_int = 6;
 pub const SOCK_PACKET: ::c_int = 10;
 
+pub const IPPROTO_MAX: ::c_int = 256;
+
 pub const SOL_SOCKET: ::c_int = 1;
 pub const SOL_SCTP: ::c_int = 132;
 pub const SOL_IPX: ::c_int = 256;
@@ -1085,6 +1087,8 @@ pub const SO_RXQ_OVFL: ::c_int = 40;
 pub const SO_PEEK_OFF: ::c_int = 42;
 pub const SO_BUSY_POLL: ::c_int = 46;
 
+pub const TCP_ULP: ::c_int = 31;
+
 pub const IPTOS_ECN_NOTECT: u8 = 0x00;
 
 pub const O_ACCMODE: ::c_int = 3;
diff --git a/src/unix/linux_like/emscripten/mod.rs b/src/unix/linux_like/emscripten/mod.rs
index 2584a3ba07bcf..945efeea74ea2 100644
--- a/src/unix/linux_like/emscripten/mod.rs
+++ b/src/unix/linux_like/emscripten/mod.rs
@@ -1557,6 +1557,8 @@ pub const SOCK_STREAM: ::c_int = 1;
 pub const SOCK_DGRAM: ::c_int = 2;
 pub const SOCK_SEQPACKET: ::c_int = 5;
 
+pub const IPPROTO_MAX: ::c_int = 256;
+
 pub const SOL_SOCKET: ::c_int = 1;
 
 pub const SO_REUSEADDR: ::c_int = 2;
diff --git a/src/unix/linux_like/linux/mod.rs b/src/unix/linux_like/linux/mod.rs
index 18dd09d8468f1..249c98bce2bd6 100644
--- a/src/unix/linux_like/linux/mod.rs
+++ b/src/unix/linux_like/linux/mod.rs
@@ -1240,6 +1240,7 @@ pub const RTLD_NOW: ::c_int = 0x2;
 pub const AT_EACCESS: ::c_int = 0x200;
 
 pub const TCP_MD5SIG: ::c_int = 14;
+pub const TCP_ULP: ::c_int = 31;
 
 align_const! {
     pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
@@ -1274,6 +1275,17 @@ pub const SCHED_RESET_ON_FORK: ::c_int = 0x40000000;
 
 // netinet/in.h
 // NOTE: These are in addition to the constants defined in src/unix/mod.rs
+
+/// Multipath TCP
+pub const IPPROTO_MPTCP: ::c_int = 262;
+#[deprecated(
+    since = "0.2.80",
+    note = "This value was increased in the newer kernel \
+            and we'll change this following upstream in the future release. \
+            See #1896 for more info."
+)]
+pub const IPPROTO_MAX: ::c_int = 256;
+
 pub const AF_IB: ::c_int = 27;
 pub const AF_MPLS: ::c_int = 28;
 pub const AF_NFC: ::c_int = 39;
diff --git a/src/unix/linux_like/mod.rs b/src/unix/linux_like/mod.rs
index 08f7222ee9999..80c4f5bc0b7dd 100644
--- a/src/unix/linux_like/mod.rs
+++ b/src/unix/linux_like/mod.rs
@@ -869,7 +869,6 @@ pub const IPPROTO_UDPLITE: ::c_int = 136;
 pub const IPPROTO_MPLS: ::c_int = 137;
 /// raw IP packet
 pub const IPPROTO_RAW: ::c_int = 255;
-pub const IPPROTO_MAX: ::c_int = 256;
 
 pub const MCAST_EXCLUDE: ::c_int = 0;
 pub const MCAST_INCLUDE: ::c_int = 1;