diff --git a/src/api.rs b/src/api.rs
index 65a39025..427bfe10 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -461,6 +461,9 @@ impl Events {
 #[repr(i32)]
 #[derive(Copy, Clone, Debug)]
 pub enum EventType {
+    /// Value used for uninitialized placeholder events.
+    _Placeholder = 0,
+
     /// Midi event. See `api::MidiEvent`.
     Midi = 1,