diff --git a/substrate/frame/system/src/lib.rs b/substrate/frame/system/src/lib.rs
index d8a50f9f7a..536127e672 100644
--- a/substrate/frame/system/src/lib.rs
+++ b/substrate/frame/system/src/lib.rs
@@ -182,7 +182,7 @@ pub mod pallet {
 			+ OriginTrait<Call=Self::Call>;
 
 		/// The aggregated `Call` type.
-		type Call: Dispatchable + Debug;
+		type Call: Dispatchable + Debug + FullCodec;
 
 		/// Account index (aka nonce) type. This stores the number of previous transactions associated
 		/// with a sender account.