diff --git a/ext/node/polyfills/v8.ts b/ext/node/polyfills/v8.ts
index 9df199865e..e24a79ab5a 100644
--- a/ext/node/polyfills/v8.ts
+++ b/ext/node/polyfills/v8.ts
@@ -227,6 +227,7 @@ function arrayBufferViewTypeToIndex(abView: ArrayBufferView) {
   // Index 10 is FastBuffer.
   if (type === "[object BigInt64Array]") return 11;
   if (type === "[object BigUint64Array]") return 12;
+  if (type === "[object Float16Array]") return 13;
   return -1;
 }
 export class DefaultSerializer extends Serializer {
@@ -276,6 +277,7 @@ function arrayBufferViewIndexToType(index: number): any {
   if (index === 10) return Buffer;
   if (index === 11) return BigInt64Array;
   if (index === 12) return BigUint64Array;
+  if (index === 13) return Float16Array;
   return undefined;
 }