diff --git a/mod.zig b/mod.zig
index a195871a612a95ca3e058a3dbcf26d21268f73b3..83a9dd37f75ca31edd32f19aadfdc9478cbda045 100644
--- a/mod.zig
+++ b/mod.zig
@@ -917,7 +917,13 @@ pub const chroot = @compileError("TODO: chroot");
 // sync
 // void sync(void);
 // asmlinkage long sys_sync(void);
-pub const sync = @compileError("TODO: sync");
+pub fn sync() errno.Error!void {
+    const r = syscall0(.sync);
+    return switch (_errno(r)) {
+        .ok => {},
+        _ => |c| errno.errorFromInt(@intFromEnum(c)),
+    };
+}
 
 // acct
 // int acct(const char *_Nullable filename);
diff --git a/test.zig b/test.zig
index a08f76083ebf80b4dfe34363e87a010eb0eaacef..ddab99131ddb76fa37f16571103597ba7e2daa80 100644
--- a/test.zig
+++ b/test.zig
@@ -21,4 +21,5 @@ test {
     _ = &linux.setsid;
     _ = &linux.munlockall;
     _ = &linux.vhangup;
+    _ = &linux.sync;
 }