diff --git a/quic/core/quic_data_writer.cc b/quic/core/quic_data_writer.cc
index 1753bbe..4ed9b45 100644
--- a/quic/core/quic_data_writer.cc
+++ b/quic/core/quic_data_writer.cc
@@ -91,6 +91,17 @@
   return true;
 }
 
+bool QuicDataWriter::WriteInsecureRandomBytes(QuicRandom* random,
+                                              size_t length) {
+  char* dest = BeginWrite(length);
+  if (!dest) {
+    return false;
+  }
+
+  random->InsecureRandBytes(dest, length);
+  IncreaseLength(length);
+  return true;
+}
 
 // Converts a uint64_t into an IETF/Quic formatted Variable Length
 // Integer. IETF Variable Length Integers have 62 significant bits, so