diff --git a/src/imu/main.rs b/src/imu/main.rs
index 6043107..5d0f900 100644
--- a/src/imu/main.rs
+++ b/src/imu/main.rs
@@ -69,7 +69,7 @@ fn units() -> HashMap<String, String> {
 fn signals(m: &Motion) -> [(&'static str, Value); 5] {
     let r = |v: f64, places: i32| {
         let f = 10f64.powi(places);
-        json!((v * f).round() / f)
+        json!((v * f).round() / f + 0.0) // + 0.0 turns -0.0 into 0.0
     };
     [
         ("imu_roll_deg", r(m.roll_deg, 1)),