diff --git a/lib/std/c/darwin.zig b/lib/std/c/darwin.zig
index 8bb30efab3360455c0e694bfac9cf9131c74b57d..b85a5bc40f5039639356864e75dc5f191fae76ec 100644
--- a/lib/std/c/darwin.zig
+++ b/lib/std/c/darwin.zig
@@ -291,6 +291,7 @@ pub const sockaddr = extern struct {
     family: sa_family_t,
     data: [14]u8,
 
+    pub const SS_MAXSIZE = 128;
     pub const storage = std.x.os.Socket.Address.Native.Storage;
     pub const in = extern struct {
         len: u8 = @sizeOf(in),
diff --git a/lib/std/c/dragonfly.zig b/lib/std/c/dragonfly.zig
index 35bbeac6a398136975ab0d8cc93c5620b029bbd6..a2b7e31b4fb051606c9c602cfce5fbb64aeaa019 100644
--- a/lib/std/c/dragonfly.zig
+++ b/lib/std/c/dragonfly.zig
@@ -465,6 +465,7 @@ pub const sockaddr = extern struct {
     family: u8,
     data: [14]u8,
 
+    pub const SS_MAXSIZE = 128;
     pub const storage = std.x.os.Socket.Address.Native.Storage;
 
     pub const in = extern struct {
diff --git a/lib/std/c/freebsd.zig b/lib/std/c/freebsd.zig
index f65af3f915a8f7cda41310c05f8ae1949994de94..ecc96900690a91c687890db929e6f79c2cf31feb 100644
--- a/lib/std/c/freebsd.zig
+++ b/lib/std/c/freebsd.zig
@@ -323,6 +323,7 @@ pub const sockaddr = extern struct {
     /// actually longer; address value
     data: [14]u8,
 
+    pub const SS_MAXSIZE = 128;
     pub const storage = std.x.os.Socket.Address.Native.Storage;
 
     pub const in = extern struct {
diff --git a/lib/std/c/haiku.zig b/lib/std/c/haiku.zig
index 1ad51cfaddf79a178f8feff6f8fccf61a3bd2cb2..dcebeea95e40cd88cf027f3ad204b404d6cf8366 100644
--- a/lib/std/c/haiku.zig
+++ b/lib/std/c/haiku.zig
@@ -339,6 +339,7 @@ pub const sockaddr = extern struct {
     /// actually longer; address value
     data: [14]u8,
 
+    pub const SS_MAXSIZE = 128;
     pub const storage = std.x.os.Socket.Address.Native.Storage;
 
     pub const in = extern struct {
diff --git a/lib/std/c/netbsd.zig b/lib/std/c/netbsd.zig
index d76a9ecdf59407021d7e311370002492018210cb..042d540bcc320ba158f60065d9138b7fb88c2d55 100644
--- a/lib/std/c/netbsd.zig
+++ b/lib/std/c/netbsd.zig
@@ -476,6 +476,7 @@ pub const sockaddr = extern struct {
     /// actually longer; address value
     data: [14]u8,
 
+    pub const SS_MAXSIZE = 128;
     pub const storage = std.x.os.Socket.Address.Native.Storage;
 
     pub const in = extern struct {
diff --git a/lib/std/c/openbsd.zig b/lib/std/c/openbsd.zig
index b3919d47241345ee271d00dddbb5000bcdc096ab..39425b5e0efb72ce9ed82cb4d22842f0ea686951 100644
--- a/lib/std/c/openbsd.zig
+++ b/lib/std/c/openbsd.zig
@@ -279,6 +279,7 @@ pub const sockaddr = extern struct {
     /// actually longer; address value
     data: [14]u8,
 
+    pub const SS_MAXSIZE = 256;
     pub const storage = std.x.os.Socket.Address.Native.Storage;
 
     pub const in = extern struct {
diff --git a/lib/std/os/linux.zig b/lib/std/os/linux.zig
index df7166a4ff9931f54cc25df319d2285047501199..2ea127a5228021d9dd13d32adffeaee952039e6f 100644
--- a/lib/std/os/linux.zig
+++ b/lib/std/os/linux.zig
@@ -2923,6 +2923,7 @@ pub const sockaddr = extern struct {
     family: sa_family_t,
     data: [14]u8,
 
+    pub const SS_MAXSIZE = 128;
     pub const storage = std.x.os.Socket.Address.Native.Storage;
 
     /// IPv4 socket address
diff --git a/lib/std/os/windows/ws2_32.zig b/lib/std/os/windows/ws2_32.zig
index 168a098397da4ae6b6715c9d13064b6d0082433b..a6eb9e07ff578169b939cf32ef1d3cb8526bbcfe 100644
--- a/lib/std/os/windows/ws2_32.zig
+++ b/lib/std/os/windows/ws2_32.zig
@@ -1105,6 +1105,7 @@ pub const sockaddr = extern struct {
     family: ADDRESS_FAMILY,
     data: [14]u8,
 
+    pub const SS_MAXSIZE = 128;
     pub const storage = std.x.os.Socket.Address.Native.Storage;
 
     /// IPv4 socket address
diff --git a/lib/std/x/os/socket.zig b/lib/std/x/os/socket.zig
index 5930b8cb9a7c63dc86b77f2c9fa1d21a8c825458..529fd19598ae647dd9d72d0d36bfb6da0b15a4db 100644
--- a/lib/std/x/os/socket.zig
+++ b/lib/std/x/os/socket.zig
@@ -37,7 +37,7 @@ pub const Socket = struct {
 
             /// POSIX `sockaddr.storage`. The expected size and alignment is specified in IETF RFC 2553.
             pub const Storage = extern struct {
-                pub const expected_size = 128;
+                pub const expected_size = os.sockaddr.SS_MAXSIZE;
                 pub const expected_alignment = 8;
 
                 pub const padding_size = expected_size -