diff --git a/kernel-1100/src/lib.rs b/kernel-1100/src/lib.rs
index 52b03ac..e070ef4 100644
--- a/kernel-1100/src/lib.rs
+++ b/kernel-1100/src/lib.rs
@@ -40,6 +40,7 @@ impl okf::Kernel for Kernel {
     const EINTR: NonZero<c_int> = unsafe { NonZero::new_unchecked(4) };
     const EIO: NonZero<c_int> = unsafe { NonZero::new_unchecked(5) };
     const LK_EXCLUSIVE: c_int = 0x80000;
+    const LK_SHARED: c_int = 0x200000;
     #[offset(0x15415B0)]
     const M_TEMP: StaticMut<Self::Malloc>;
     const MBF_MNTLSTLOCK: c_int = 2;
diff --git a/src/lib.rs b/src/lib.rs
index 6644411..3b5d57d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -51,6 +51,7 @@ pub trait Kernel: MappedKernel {
     const EINTR: NonZero<c_int>;
     const EIO: NonZero<c_int>;
     const LK_EXCLUSIVE: c_int;
+    const LK_SHARED: c_int;
     const M_TEMP: StaticMut<Self::Malloc>;
     const MBF_MNTLSTLOCK: c_int;
     const MBF_NOWAIT: c_int;