diff --git a/changelogs/unreleased/87305.json b/changelogs/unreleased/87305.json
new file mode 100644
index 0000000000..1e3e19b9a2
--- /dev/null
+++ b/changelogs/unreleased/87305.json
@@ -0,0 +1,5 @@
+{
+  "title": "StockMoveLine: use the right API to add a tracking number",
+  "type": "fix",
+  "packages": "stock"
+}
diff --git a/packages/apps/stock/src/api/tracking-number-api.js b/packages/apps/stock/src/api/tracking-number-api.js
index fadf874bd7..ef0a189f0b 100644
--- a/packages/apps/stock/src/api/tracking-number-api.js
+++ b/packages/apps/stock/src/api/tracking-number-api.js
@@ -89,12 +89,14 @@ export async function updateStockMoveLineTrackingNumber({
   trackingNumber,
 }) {
   return getActionApi().send({
-    url: `/ws/aos/stock-move-line/${stockMoveLineId}`,
-    method: 'put',
+    url: `/ws/rest/com.axelor.apps.stock.db.StockMoveLine/${stockMoveLineId}`,
+    method: 'post',
     body: {
-      id: stockMoveLineId,
-      version: stockMoveLineVersion,
-      trackingNumber,
+      data: {
+        id: stockMoveLineId,
+        version: stockMoveLineVersion,
+        trackingNumber,
+      },
     },
     description: 'add tracking number on stock move line',
     matchers: {