diff --git a/src/index.ts b/src/index.ts
index aa7f3df..0d31491 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -27,7 +27,9 @@ const getECParams = (event: MCEvent) => {
         payload.name ||
         payload.product_id ||
         payload.sku ||
-        payload.products?.map((p: any) => p.name).join()
+        Array.isArray(payload.products)
+          ? payload.products.map((p: any) => p.name).join()
+          : ''
       data.ev = payload.price || payload.total || payload.value
       data.gv = payload.price || data.gv
       break
@@ -48,7 +50,9 @@ const getECParams = (event: MCEvent) => {
         payload.checkout_id ||
         payload.product_id ||
         payload.name ||
-        payload.products?.map((p: any) => p.name).join()
+        Array.isArray(payload.products)
+          ? payload.products.map((p: any) => p.name).join()
+          : ''
       data.ev =
         payload.revenue || payload.total || payload.value || payload.price
   }