diff --git a/quic/core/quic_framer.cc b/quic/core/quic_framer.cc
index 30a3742..b05b457 100644
--- a/quic/core/quic_framer.cc
+++ b/quic/core/quic_framer.cc
@@ -1737,6 +1737,7 @@
         visitor_->OnUndecryptablePacket(
             QuicEncryptedPacket(encrypted_reader->FullPayload()),
             decryption_level, has_decryption_key);
+        RecordDroppedPacketReason(DroppedPacketReason::DECRYPTION_FAILURE);
         set_detailed_error(quiche::QuicheStrCat(
             "Unable to decrypt ", EncryptionLevelToString(decryption_level),
             " header protection", has_decryption_key ? "" : " (missing key)",