1 files changed, 4 insertions, 3 deletions
diff --git a/src/modules/delay.rs b/src/modules/delay.rs
index 5b5ce06..31036fe 100644
--- a/src/modules/delay.rs
+++ b/src/modules/delay.rs
@@ -17,7 +17,7 @@ pub struct DelayKind;
 #[derive(Deserialize)]
 struct Delay {
     duration: u64,
-    stdev: u64,
+    stdev: Option<u64>,
     next: DynNode,
 }
 
@@ -36,11 +36,12 @@ impl Node for Delay {
         request: NodeRequest,
     ) -> Pin<Box<dyn Future<Output = Result<NodeResponse, ServiceError>> + Send + Sync + 'a>> {
         Box::pin(async move {
-            sleep(Duration::from_millis(if self.stdev == 0 {
+            let stdev = self.stdev.unwrap_or_default();
+            sleep(Duration::from_millis(if stdev == 0 {
                 self.duration
             } else {
                 self.duration.saturating_add_signed(
-                    rand_distr::Normal::new(0., self.stdev as f32)
+                    rand_distr::Normal::new(0., stdev as f32)
                         .unwrap()
                         .sample(&mut rand::rng()) as i64,
                 )