diff --git a/src/util/lp/antecedents.h b/src/util/lp/antecedents.h
new file mode 100644
index 000000000..e96c92614
--- /dev/null
+++ b/src/util/lp/antecedents.h
@@ -0,0 +1,10 @@
+/*
+  Copyright (c) 2017 Microsoft Corporation
+  Author: Lev Nachmanson
+*/
+#pragma once
+
+namespace lp {
+class antecedents {
+};
+}