diff --git a/mod.zig b/mod.zig
index f12d6009dee50c662b4d8deb68169790c87b8b71..208bf011bcc20866b04a12a72f0418df47b9fe0f 100644
--- a/mod.zig
+++ b/mod.zig
@@ -2649,6 +2649,7 @@ pub const libc = struct {
     pub extern fn gettid() pid_t;
     pub extern fn accept4(socket: c_int, noalias address: ?*struct_sockaddr, noalias address_len: *socklen_t, flags: c_int) c_int;
     pub extern fn memfd_create(name: [*:0]const u8, flags: c_uint) c_int;
+    pub extern fn sendfile(out_fd: c_int, in_fd: c_int, offset: ?*const off_t, count: usize) isize;
 };
 
 pub const clock_t = c_long;
@@ -3176,3 +3177,9 @@ pub fn getsockname(socketfd: c_uint, noalias address: *struct_sockaddr, noalias
     if (rc == -1) return errno.fromInt(errno.fromLibC());
     std.debug.assert(rc == 0);
 }
+pub fn sendfile(out_fd: c_int, in_fd: c_int, offset: ?*const off_t, count: usize) errno.Error!usize {
+    const rc = libc.sendfile(out_fd, in_fd, offset, count);
+    if (rc == -1) return errno.fromInt(errno.fromLibC());
+    std.debug.assert(rc >= 0);
+    return @intCast(rc);
+}
diff --git a/test.zig b/test.zig
index 372197947cee352306b05b6da0fca01288a89346..82ab24657f3fb3fd58ef037959d0760027e0653d 100644
--- a/test.zig
+++ b/test.zig
@@ -33,4 +33,5 @@ test {
     _ = &linux.write;
     _ = &linux.writev;
     _ = &linux.getsockname;
+    _ = &linux.sendfile;
 }