diff --git a/deps/ox/src/ox/mc/write.hpp b/deps/ox/src/ox/mc/write.hpp
index 8d6de382..a5ab40f1 100644
--- a/deps/ox/src/ox/mc/write.hpp
+++ b/deps/ox/src/ox/mc/write.hpp
@@ -185,9 +185,9 @@ template<typename T>
 		for (std::size_t i = 0; i < len; i++) {
 			auto &key = keys[i];
 			const auto keyLen = ox_strlen(key);
-			auto wkey = static_cast<char*>(ox_alloca(keyLen + 1));
+			auto wkey = ox_malloca(keyLen + 1, char, 0);
 			memcpy(wkey, key.c_str(), keyLen + 1);
-			oxReturnError(writer.field("", SerStr(&wkey, keyLen)));
+			oxReturnError(writer.field("", SerStr(wkey.get(), keyLen)));
 			oxReturnError(writer.field("", &(*val)[key]));
 		}