diff --git a/state-chain/custom-rpc/src/lib.rs b/state-chain/custom-rpc/src/lib.rs
index cbaa763a47..ff216e42f8 100644
--- a/state-chain/custom-rpc/src/lib.rs
+++ b/state-chain/custom-rpc/src/lib.rs
@@ -1681,6 +1681,7 @@ where
 			base_asset,
 			quote_asset,
 		) else {
+			pending_sink.reject(call_error("requested pool does not exist")).await;
 			return;
 		};