diff --git a/Cargo.toml b/Cargo.toml
index a2152b08e..09e2f93cb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -356,6 +356,7 @@ features = [
     "ring-compat",
     "compat-upload-signatures",
     "compat-optional-txn-pdus",
+    "compat-get-3pids",
     "unstable-msc2666",
     "unstable-msc2867",
     "unstable-msc2870",