diff --git a/migrations/2020-03-30-225756_add_room_time_constraint/down.sql b/migrations/2020-03-30-225756_add_room_time_constraint/down.sql
new file mode 100644
index 00000000..62a61660
--- /dev/null
+++ b/migrations/2020-03-30-225756_add_room_time_constraint/down.sql
@@ -0,0 +1 @@
+ALTER TABLE room DROP CONSTRAINT room_time_presence;
diff --git a/migrations/2020-03-30-225756_add_room_time_constraint/up.sql b/migrations/2020-03-30-225756_add_room_time_constraint/up.sql
new file mode 100644
index 00000000..b8648127
--- /dev/null
+++ b/migrations/2020-03-30-225756_add_room_time_constraint/up.sql
@@ -0,0 +1 @@
+ALTER TABLE room ADD CONSTRAINT room_time_presence CHECK (time <> 'empty');