diff --git a/source/common/quic/envoy_quic_client_session.cc b/source/common/quic/envoy_quic_client_session.cc
index 4cf14c31db3b9..a1dd566bedacd 100644
--- a/source/common/quic/envoy_quic_client_session.cc
+++ b/source/common/quic/envoy_quic_client_session.cc
@@ -101,6 +101,7 @@ void EnvoyQuicClientSession::OnCanCreateNewOutgoingStream(bool unidirectional) {
     return;
   }
   uint32_t streams_available = streamsAvailable();
+  ASSERT(streams_available > 0);
   if (streams_available > 0) {
     http_connection_callbacks_->onMaxStreamsChanged(streams_available);
   }