diff --git a/crates/ruma/Cargo.toml b/crates/ruma/Cargo.toml
index d44f3dd7..5d834c14 100644
--- a/crates/ruma/Cargo.toml
+++ b/crates/ruma/Cargo.toml
@@ -103,6 +103,11 @@ unstable-exhaustive-types = [
     "ruma-push-gateway-api/unstable-exhaustive-types",
     "ruma-state-res/unstable-exhaustive-types"
 ]
+unstable-extensible-events = [
+    "unstable-msc3246",
+    "unstable-msc3488",
+    "unstable-msc3553",
+]
 unstable-pdu = ["ruma-common/unstable-pdu"]
 unstable-pre-spec = [
     "ruma-common/unstable-pre-spec",