--- a/media/mtransport/transportlayerdtls.cpp
+++ b/media/mtransport/transportlayerdtls.cpp
@@ -882,17 +882,19 @@ void TransportLayerDtls::Handshake() {
                     LAYER_INFO << "Setting DTLS timeout to " << timeout_ms);
           timer_->SetTarget(target_);
           timer_->InitWithFuncCallback(TimerCallback,
                                        this, timeout_ms,
                                        nsITimer::TYPE_ONE_SHOT);
         }
         break;
       default:
-        MOZ_MTLOG(ML_ERROR, LAYER_INFO << "SSL handshake error "<< err);
+        const char *err_msg = PR_ErrorToName(err);
+        MOZ_MTLOG(ML_ERROR, LAYER_INFO << "DTLS handshake error " << err << " ("
+                  << err_msg << ")");
         TL_SET_STATE(TS_ERROR);
         break;
     }
   }
 }
 
 // Checks if ALPN was negotiated correctly and returns false if it wasn't.
 // After this returns successfully, alpn_ will be set to the negotiated