diff --git a/library/unwind/src/libunwind.rs b/library/unwind/src/libunwind.rs
index eeeed3afcd3..f6a68073b2f 100644
--- a/library/unwind/src/libunwind.rs
+++ b/library/unwind/src/libunwind.rs
@@ -75,6 +75,9 @@ pub enum _Unwind_Reason_Code {
 #[cfg(all(target_arch = "hexagon", target_os = "linux"))]
 pub const unwinder_private_data_size: usize = 35;
 
+#[cfg(target_arch = "loongarch64")]
+pub const unwinder_private_data_size: usize = 2;
+
 #[repr(C)]
 pub struct _Unwind_Exception {
     pub exception_class: _Unwind_Exception_Class,