diff --git a/editoast/src/views/timetable/stdcm/request.rs b/editoast/src/views/timetable/stdcm/request.rs
index 72945b9608d..aa71719870c 100644
--- a/editoast/src/views/timetable/stdcm/request.rs
+++ b/editoast/src/views/timetable/stdcm/request.rs
@@ -12,7 +12,7 @@ use itertools::Itertools;
 use serde::Deserialize;
 use serde::Serialize;
 use utoipa::ToSchema;
-use validator::Validate;
+use validator::{Validate, ValidationError, ValidationErrors};
 
 use crate::core::pathfinding::PathfindingInputError;
 use crate::error::Result;
@@ -68,7 +68,7 @@ struct StepTimingData {
 
 /// An STDCM request
 #[editoast_derive::annotate_units]
-#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Validate, ToSchema)]
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, ToSchema)]
 pub(super) struct Request {
     /// Deprecated, first step arrival time should be used instead
     pub(super) start_time: Option<DateTime<Utc>>,
@@ -105,7 +105,6 @@ pub(super) struct Request {
     #[schema(value_type = Option<String>, example = json!(["5%", "2min/100km"]))]
     pub(super) margin: Option<MarginValue>,
     /// Total mass of the consist
-    //#[validate(range(exclusive_min = 0.0))] TODOUOM
     #[serde(default, with = "kilogram::option")]
     pub(super) total_mass: Option<Mass>,
     /// Total length of the consist in meters
@@ -292,3 +291,18 @@ impl Request {
         Ok(Some(towed_rolling_stock))
     }
 }
+
+impl Validate for Request {
+    fn validate(&self) -> Result<(), ValidationErrors> {
+        if let Some(mass) = self.total_mass {
+            if mass <= kilogram::new(0.0) {
+                let err = ValidationError::new("the total mass must be strictly positive");
+                let mut errs = ValidationErrors::new();
+                errs.add("total_mass", err);
+                return Err(errs);
+            }
+        }
+
+        Ok(())
+    }
+}