diff --git a/deps/ox/src/ox/mc/write.hpp b/deps/ox/src/ox/mc/write.hpp
index 5fa8adb1..9d3de41e 100644
--- a/deps/ox/src/ox/mc/write.hpp
+++ b/deps/ox/src/ox/mc/write.hpp
@@ -365,7 +365,8 @@ constexpr Error MetalClawWriter::field(const char*, const HashMap<String, T> *va
 			auto wkey = ox_malloca(keyLen + 1, char, 0);
 			memcpy(wkey, key.c_str(), keyLen + 1);
 			oxReturnError(handler.fieldCString("", wkey.get(), keyLen));
-			oxReturnError(handler.field("", val->at(key).value));
+			oxRequireM(value, val->at(key));
+			oxReturnError(handler.field("", value));
 		}
 		m_buffIt += writer.m_buffIt;
 		fieldSet = true;
diff --git a/deps/ox/src/ox/oc/write.hpp b/deps/ox/src/ox/oc/write.hpp
index 182ea4b8..0199b877 100644
--- a/deps/ox/src/ox/oc/write.hpp
+++ b/deps/ox/src/ox/oc/write.hpp
@@ -122,7 +122,10 @@ class OrganicClawWriter {
 				ModelHandlerInterface handler{&w};
 				for (std::size_t i = 0; i < keys.size(); ++i) {
 					const auto k = keys[i].c_str();
-					oxReturnError(handler.field(k, val->at(k).value));
+					if (k) [[likely]] {
+						oxRequireM(value, val->at(k));
+						oxReturnError(handler.field(k, value));
+					}
 				}
 				value(key) = w.m_json;
 			}