diff --git a/lib/utils.js b/lib/utils.js
index d26b5bae..7931b44d 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -169,7 +169,7 @@ const flatOTLPAttrs = (attrs) => {
         return
       }
     }
-    if (val.arrayValue) {
+    if (val.arrayValue && val.arrayValue.values) {
       val.arrayValue.values.forEach((v, i) => {
         flatVal(`${i}`, v, `${prefix}${key}.`, res)
       })