diff --git a/crates/projection-irc/src/cap.rs b/crates/projection-irc/src/cap.rs
index 83f1e24..9d96cf2 100644
--- a/crates/projection-irc/src/cap.rs
+++ b/crates/projection-irc/src/cap.rs
@@ -6,5 +6,6 @@ bitflags! {
         const None = 0;
         const Sasl = 1 << 0;
         const ServerTime = 1 << 1;
+        const ChatHistory = 1 << 2;
     }
 }