diff --git a/substrate/substrate/rpc/src/metadata.rs b/substrate/substrate/rpc/src/metadata.rs
index 41bed2b845ffcddb2ac215f26b1d61f27420f85c..06d19d11d8cecd5fbb5598e465859f3586737b23 100644
--- a/substrate/substrate/rpc/src/metadata.rs
+++ b/substrate/substrate/rpc/src/metadata.rs
@@ -22,7 +22,7 @@ use rpc::futures::sync::mpsc;
 
 /// RPC Metadata.
 ///
-/// Manages peristent session for transports that support it
+/// Manages persistent session for transports that support it
 /// and may contain some additional info extracted from specific transports
 /// (like remote client IP address, request headers, etc)
 #[derive(Default, Clone)]