diff --git a/src/machine/mod.rs b/src/machine/mod.rs
index 61b1909b..45688ff4 100644
--- a/src/machine/mod.rs
+++ b/src/machine/mod.rs
@@ -60,6 +60,7 @@ use std::sync::atomic::AtomicBool;
 
 use self::config::MachineConfig;
 use self::parsed_results::*;
+use tokio::runtime::Runtime;
 use rand::rngs::StdRng;
 use rand::SeedableRng;