diff --git a/msfs/src/legacy.rs b/msfs/src/legacy.rs
index 444a0f9429..884c593bc2 100644
--- a/msfs/src/legacy.rs
+++ b/msfs/src/legacy.rs
@@ -115,6 +115,13 @@ pub fn trigger_key_event(event_id: sys::ID32, value: sys::UINT32) {
     }
 }
 
+/// trigger_key_event_EX1
+pub fn trigger_key_event_ex1(event_id: sys::ID32, value0: sys::UINT32, value1: sys::UINT32, value2: sys::UINT32, value3: sys::UINT32, value4: sys::UINT32) {
+    unsafe {
+        sys::trigger_key_event_EX1(event_id, value0, value1, value2, value3, value4);
+    }
+}
+
 #[doc(hidden)]
 pub trait ExecuteCalculatorCodeImpl {
     fn execute(code: &std::ffi::CStr) -> Option<Self>