diff --git a/src/actor.rs b/src/actor.rs
index 3bfc6cd..d4d2b2d 100644
--- a/src/actor.rs
+++ b/src/actor.rs
@@ -957,7 +957,7 @@ fn handle_wants_acceleration(
             sinks.get(&audio::Sfx::Thruster),
         ),
         (
-            1.0,
+            0.6,
             1.0,
             actor::EngineType::Ion,
             sinks.get(&audio::Sfx::Ion),