diff --git a/veilid-core/src/rpc_processor/operation_waiter.rs b/veilid-core/src/rpc_processor/operation_waiter.rs
index fb276942..95044b06 100644
--- a/veilid-core/src/rpc_processor/operation_waiter.rs
+++ b/veilid-core/src/rpc_processor/operation_waiter.rs
@@ -93,7 +93,7 @@ where
                 .waiting_op_table
                 .remove(&op_id)
                 .ok_or_else(RPCError::else_internal(format!(
-                    "Unmatched app call id, possibly too late for timeout: {}",
+                    "Unmatched operation id: {}",
                     op_id
                 )))?
         };