diff --git a/aos/configuration.cc b/aos/configuration.cc
index 736f772..8bbbdd5 100644
--- a/aos/configuration.cc
+++ b/aos/configuration.cc
@@ -439,7 +439,8 @@
           switch (connection->timestamp_logger()) {
             case LoggerConfig::LOCAL_LOGGER:
             case LoggerConfig::NOT_LOGGED:
-              CHECK(!connection->has_timestamp_logger_nodes());
+              CHECK(!connection->has_timestamp_logger_nodes())
+                  << ": " << CleanedChannelToString(c);
               break;
             case LoggerConfig::REMOTE_LOGGER:
             case LoggerConfig::LOCAL_AND_REMOTE_LOGGER: