diff --git a/src/runtime2/mod.rs b/src/runtime2/mod.rs
index 4e213a77a4b315c88752ea843bfea22f4fecf53c..50fd6dc2813384d890c9d4fe875f745b6d872f48 100644
--- a/src/runtime2/mod.rs
+++ b/src/runtime2/mod.rs
@@ -1,3 +1,4 @@
+#[macro_use] mod error;
 mod store;
 mod runtime;
 mod component;
@@ -8,6 +9,7 @@ mod stdlib;
 #[cfg(test)] mod tests;
 
 pub use runtime::Runtime;
+pub(crate) use error::RtError;
 pub(crate) use scheduler::SchedulerCtx;
 pub(crate) use communication::{
     PortId, PortKind, PortState,