diff --git a/.changeset/tender-rats-jam.md b/.changeset/tender-rats-jam.md
new file mode 100644
index 00000000..59431a85
--- /dev/null
+++ b/.changeset/tender-rats-jam.md
@@ -0,0 +1,5 @@
+---
+"@codedazur/react-tracking": patch
+---
+
+The dataLayer is now prepared in case the script is not yet loaded.
diff --git a/packages/react-tracking/utilities/createGtmTracker.ts b/packages/react-tracking/utilities/createGtmTracker.ts
index d76338bb..c8e923d4 100644
--- a/packages/react-tracking/utilities/createGtmTracker.ts
+++ b/packages/react-tracking/utilities/createGtmTracker.ts
@@ -10,7 +10,9 @@ export function createGtmTracker({
   prefix,
 }: { prefix?: string } = {}): Tracker {
   return function gtmTracker({ type, ...event }) {
-    window.dataLayer?.push({
+    window.dataLayer = window.dataLayer || [];
+
+    window.dataLayer.push({
       event: [prefix, type].filter(Boolean).join("."),
       ...event,
     });