diff --git a/quic/core/crypto/crypto_protocol.h b/quic/core/crypto/crypto_protocol.h
index 0ebe0e4..3deafcc 100644
--- a/quic/core/crypto/crypto_protocol.h
+++ b/quic/core/crypto/crypto_protocol.h
@@ -29,7 +29,8 @@
 // The following tags have been deprecated and should not be reused:
 // "1CON", "BBQ4", "NCON", "RCID", "SREJ", "TBKP", "TB10", "SCLS", "SMHL",
 // "QNZR", "B2HI", "H2PR", "FIFO", "LIFO", "RRWS", "QNSP", "B2CL", "CHSP",
-// "BPTE", "ACKD", "AKD2", "AKD4", "MAD1", "MAD4", "MAD5", "ACD0", "ACKQ"
+// "BPTE", "ACKD", "AKD2", "AKD4", "MAD1", "MAD4", "MAD5", "ACD0", "ACKQ",
+// "TLPR"
 
 // clang-format off
 const QuicTag kCHLO = TAG('C', 'H', 'L', 'O');   // Client hello
@@ -181,8 +182,6 @@
 const QuicTag kMIN1 = TAG('M', 'I', 'N', '1');   // Min CWND of 1 packet
 const QuicTag kMIN4 = TAG('M', 'I', 'N', '4');   // Min CWND of 4 packets,
                                                  // with a min rate of 1 BDP.
-const QuicTag kTLPR = TAG('T', 'L', 'P', 'R');   // Tail loss probe delay of
-                                                 // 0.5RTT.
 const QuicTag kMAD0 = TAG('M', 'A', 'D', '0');   // Ignore ack delay
 const QuicTag kMAD2 = TAG('M', 'A', 'D', '2');   // No min TLP
 const QuicTag kMAD3 = TAG('M', 'A', 'D', '3');   // No min RTO