diff --git a/spa/include/spa/pod/dynamic.h b/spa/include/spa/pod/dynamic.h
index e9998cdb2..dad9c3d71 100644
--- a/spa/include/spa/pod/dynamic.h
+++ b/spa/include/spa/pod/dynamic.h
@@ -53,11 +53,21 @@ SPA_API_POD_DYNAMIC void spa_pod_dynamic_builder_init(struct spa_pod_dynamic_bui
 		.overflow = spa_pod_dynamic_builder_overflow
 	};
 	builder->b = SPA_POD_BUILDER_INIT(data, size);
-	spa_pod_builder_set_callbacks(&builder->b, &spa_pod_dynamic_builder_callbacks, builder);
+	if (extend > 0)
+		spa_pod_builder_set_callbacks(&builder->b, &spa_pod_dynamic_builder_callbacks, builder);
 	builder->extend = extend;
 	builder->data = data;
 }
 
+SPA_API_POD_DYNAMIC void spa_pod_dynamic_builder_continue(struct spa_pod_dynamic_builder *builder,
+		struct spa_pod_builder *b)
+{
+	uint32_t remain = b->state.offset >= b->size ? 0 : b->size - b->state.offset;
+	spa_pod_dynamic_builder_init(builder,
+			remain ? SPA_PTROFF(b->data, b->state.offset, void) : NULL,
+			remain, b->callbacks.funcs == NULL ? 0 : 4096);
+}
+
 SPA_API_POD_DYNAMIC void spa_pod_dynamic_builder_clean(struct spa_pod_dynamic_builder *builder)
 {
 	if (builder->data != builder->b.data)