diff --git a/atem-connection-rs/src/lib.rs b/atem-connection-rs/src/lib.rs
index ce14b38..a7c3350 100644
--- a/atem-connection-rs/src/lib.rs
+++ b/atem-connection-rs/src/lib.rs
@@ -10,3 +10,4 @@ pub mod atem_lib;
 pub mod commands;
 pub mod enums;
 pub mod state;
+pub mod tally;
diff --git a/atem-connection-rs/src/tally.rs b/atem-connection-rs/src/tally.rs
new file mode 100644
index 0000000..4b25bb0
--- /dev/null
+++ b/atem-connection-rs/src/tally.rs
@@ -0,0 +1,13 @@
+#[derive(Debug)]
+pub struct TallyEvent {
+    tally_state: TallyState,
+    source_index: usize,
+    source_label: String,
+    source_name: String,
+}
+
+#[derive(Debug)]
+enum TallyState {
+    Program,
+    Preview,
+}