diff --git a/crates/ruma-common/src/events/state_key.rs b/crates/ruma-common/src/events/state_key.rs
index b7e24030..64b90f18 100644
--- a/crates/ruma-common/src/events/state_key.rs
+++ b/crates/ruma-common/src/events/state_key.rs
@@ -4,7 +4,7 @@ use serde::{
 };
 
 /// A type that can be used as the `state_key` for event types where that field is always empty.
-#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq, PartialOrd, Ord)]
 #[allow(clippy::exhaustive_structs)]
 pub struct EmptyStateKey;