diff --git a/iocore/net/YamlSNIConfig.cc b/iocore/net/YamlSNIConfig.cc
index cadeb77148d..a5d277837a6 100644
--- a/iocore/net/YamlSNIConfig.cc
+++ b/iocore/net/YamlSNIConfig.cc
@@ -158,7 +158,7 @@ template <> struct convert<YamlSNIConfig::Item> {
     for (const auto &elem : node) {
       if (std::none_of(valid_sni_config_keys.begin(), valid_sni_config_keys.end(),
                        [&elem](const std::string &s) { return s == elem.first.as<std::string>(); })) {
-        throw YAML::ParserException(elem.first.Mark(), "unsupported key " + elem.first.as<std::string>());
+        Warning("unsupported key '%s' in SNI config", elem.first.as<std::string>().c_str());
       }
     }