diff --git a/quic/core/quic_constants.h b/quic/core/quic_constants.h
index 587e8e2..51ad0f0 100644
--- a/quic/core/quic_constants.h
+++ b/quic/core/quic_constants.h
@@ -131,8 +131,6 @@
 
 // The timeout before the handshake succeeds.
 const int64_t kInitialIdleTimeoutSecs = 5;
-// The default idle timeout.
-const int64_t kDefaultIdleTimeoutSecs = 30;
 // The maximum idle timeout that can be negotiated.
 const int64_t kMaximumIdleTimeoutSecs = 60 * 10;  // 10 minutes.
 // The default timeout for a connection until the crypto handshake succeeds.