diff --git a/app/src/webrtc/session.cpp b/app/src/webrtc/session.cpp
index 9c51f48..6e699cf 100644
--- a/app/src/webrtc/session.cpp
+++ b/app/src/webrtc/session.cpp
@@ -365,6 +365,16 @@ void WebRtcSession::poll() {
 
     if (signaling_client_) {
         signaling_client_->poll();
+        if (signaling_ready_ && !signaling_loss_logged_ && !signaling_client_->is_connected()) {
+            signaling_loss_logged_ = true;
+            const auto since_start_ms = std::chrono::duration_cast<std::chrono::milliseconds>(
+                std::chrono::steady_clock::now() - session_started_at_).count();
+            AppendStreamLog("SIGNAL disconnected reason=" + signaling_client_->get_last_error() +
+                            " sinceStartMs=" + std::to_string(since_start_ms) +
+                            " rx=" + std::to_string(signaling_rx_count_) +
+                            " answerSent=" + std::to_string(answer_sent_ ? 1 : 0) +
+                            " remoteTrickle=" + std::to_string(remote_trickle_received_ ? 1 : 0));
+        }
     }
 
     maybe_send_keepalive();
diff --git a/app/src/webrtc_session.hpp b/app/src/webrtc_session.hpp
index 078ecdc..a539dbc 100644
--- a/app/src/webrtc_session.hpp
+++ b/app/src/webrtc_session.hpp
@@ -136,6 +136,7 @@ class WebRtcSession {
     bool manual_candidate_added_ = false;
     bool remote_trickle_received_ = false;
     bool answer_sent_ = false;
+    bool signaling_loss_logged_ = false;
     std::unique_ptr<SignalingClient> signaling_client_;
     struct PeerConnection* pc_ = nullptr;
     std::unique_ptr<FFmpegVideoDecoder> decoder_;