diff --git a/deps/ox/src/ox/std/serialize.hpp b/deps/ox/src/ox/std/serialize.hpp
index 94cd77cd..4a5dd912 100644
--- a/deps/ox/src/ox/std/serialize.hpp
+++ b/deps/ox/src/ox/std/serialize.hpp
@@ -34,8 +34,10 @@ constexpr auto sizeOf(const VectorMemMap<PlatSpec> *t) noexcept {
 	std::size_t size = 0;
 	if (t->smallVecSize) {
 		size += t->smallVecSize;
-		size += padding(size, PlatSpec::alignOf(t->size));
+		size += padding(size, PlatSpec::alignOf(t->allocator));
 	}
+	size += sizeof(t->allocator);
+	size += padding(size, PlatSpec::alignOf(t->size));
 	size += sizeof(t->size);
 	size += padding(size, PlatSpec::alignOf(t->cap));
 	size += sizeof(t->cap);
@@ -51,10 +53,22 @@ constexpr auto alignOf(const VectorMemMap<PlatSpec>&) noexcept {
 	return PlatSpec::alignOf(i);
 }
 
+template<typename PlatSpec, typename T>
+constexpr ox::Error pad(Writer_c auto *w, const T *v) noexcept {
+	const auto a = PlatSpec::alignOf(*v);
+	const auto excess = w->tellp() % a;
+	if (excess) {
+		return w->write(nullptr, a - excess);
+	} else {
+		return {};
+	}
+}
+
 template<typename PlatSpec>
 constexpr ox::Error serialize(Writer_c auto *buff, const VectorMemMap<PlatSpec> &vm) noexcept {
 	oxReturnError(buff->write(nullptr, vm.smallVecSize));
 	oxReturnError(serialize(buff, PlatSpec::correctEndianness(vm.allocator)));
+	oxReturnError(pad<PlatSpec>(buff, &vm.size));
 	oxReturnError(serialize(buff, PlatSpec::correctEndianness(vm.size)));
 	oxReturnError(serialize(buff, PlatSpec::correctEndianness(vm.cap)));
 	oxReturnError(serialize(buff, PlatSpec::correctEndianness(vm.items)));