diff --git a/aos/configuration.cc b/aos/configuration.cc
index 0a34b02..cef3876 100644
--- a/aos/configuration.cc
+++ b/aos/configuration.cc
@@ -785,7 +785,8 @@
   if (node == nullptr) {
     return true;
   }
-  return (channel->source_node()->string_view() == node->name()->string_view());
+  return (CHECK_NOTNULL(channel)->source_node()->string_view() ==
+          node->name()->string_view());
 }
 
 bool ChannelIsReadableOnNode(const Channel *channel, const Node *node) {