diff --git a/migrations/000016_add_module_version_states_num_packages.down.sql b/migrations/000016_add_module_version_states_num_packages.down.sql
new file mode 100644
index 00000000..226c4591
--- /dev/null
+++ b/migrations/000016_add_module_version_states_num_packages.down.sql
@@ -0,0 +1,9 @@
+-- Copyright 2020 The Go Authors. All rights reserved.
+-- Use of this source code is governed by a BSD-style
+-- license that can be found in the LICENSE file.
+
+BEGIN;
+
+ALTER TABLE module_version_states DROP COLUMN num_packages;
+
+END;
diff --git a/migrations/000016_add_module_version_states_num_packages.up.sql b/migrations/000016_add_module_version_states_num_packages.up.sql
new file mode 100644
index 00000000..06bd4907
--- /dev/null
+++ b/migrations/000016_add_module_version_states_num_packages.up.sql
@@ -0,0 +1,9 @@
+-- Copyright 2020 The Go Authors. All rights reserved.
+-- Use of this source code is governed by a BSD-style
+-- license that can be found in the LICENSE file.
+
+BEGIN;
+
+ALTER TABLE module_version_states ADD COLUMN num_packages INTEGER;
+
+END;