diff --git a/bindings/rust/src/unicorn_const.rs b/bindings/rust/src/unicorn_const.rs
index df834f30..fb1a4267 100644
--- a/bindings/rust/src/unicorn_const.rs
+++ b/bindings/rust/src/unicorn_const.rs
@@ -133,6 +133,14 @@ bitflags! {
     }
 }
 
+bitflags! {
+    #[repr(C)]
+    #[derive(Copy, Clone)]
+    pub struct TcgOp: i32 {
+        const SUB = 1;
+    }
+}
+
 bitflags! {
     #[repr(C)]
     #[derive(Copy, Clone)]