1 files changed, 8 insertions, 0 deletions
diff --git a/c/pl.h b/c/pl.h
index 4268dad..d4bf18b 100644
--- a/c/pl.h
+++ b/c/pl.h
@@ -18,6 +18,14 @@ private:
 	fid_t m_f;
 };
 
+struct Mark
+{
+	Mark();
+	~Mark();
+private:
+	buf_mark_t m_m;
+};
+
 struct Query
 {
 	Query(module_t ctx, predicate_t p, term_t t0);