diff --git a/docs/schema-upgrade-1.33-1.34.sql b/docs/schema-upgrade-1.33-1.34.sql
index ad29d0b4..ac028939 100644
--- a/docs/schema-upgrade-1.33-1.34.sql
+++ b/docs/schema-upgrade-1.33-1.34.sql
@@ -46,4 +46,6 @@ BEGIN;
             msg_time TIMESTAMPTZ NOT NULL DEFAULT NOW(),
             msg TEXT NOT NULL
     ) WITHOUT OIDS;
+
+    INSERT INTO locks(name) VALUES('scheduler');
 COMMIT;
diff --git a/schemas/schema.sql b/schemas/schema.sql
index e58ad50c..a007b2cb 100644
--- a/schemas/schema.sql
+++ b/schemas/schema.sql
@@ -1035,5 +1035,6 @@ CREATE TABLE locks (
         name TEXT NOT NULL PRIMARY KEY
 ) WITHOUT OIDS;
 INSERT INTO locks(name) VALUES('protonmsg-plugin');
+INSERT INTO locks(name) VALUES('scheduler');
 
 COMMIT WORK;