diff --git a/src/yb/master/catalog_manager.cc b/src/yb/master/catalog_manager.cc
index 78c093cfb9d0..58b109fd1fe8 100644
--- a/src/yb/master/catalog_manager.cc
+++ b/src/yb/master/catalog_manager.cc
@@ -3274,6 +3274,26 @@ Status CatalogManager::DdlLog(
   return sys_catalog_->FetchDdlLog(resp->mutable_entries());
 }
 
+Status CatalogManager::StartYsqlMajorVersionUpgradeInitdb(
+    const StartYsqlMajorVersionUpgradeInitdbRequestPB* req,
+    StartYsqlMajorVersionUpgradeInitdbResponsePB* resp,
+    rpc::RpcContext* rpc, const LeaderEpoch& epoch) {
+  return STATUS(NotSupported, "Ysql major version upgrade is not supported");
+}
+
+Status CatalogManager::IsYsqlMajorVersionUpgradeInitdbDone(
+    const IsYsqlMajorVersionUpgradeInitdbDoneRequestPB* req,
+    IsYsqlMajorVersionUpgradeInitdbDoneResponsePB* resp, rpc::RpcContext* rpc) {
+  return STATUS(NotSupported, "Ysql major version upgrade is not supported");
+}
+
+Status CatalogManager::RollbackYsqlMajorVersionUpgrade(
+    const RollbackYsqlMajorVersionUpgradeRequestPB* req,
+    RollbackYsqlMajorVersionUpgradeResponsePB* resp,
+    rpc::RpcContext* rpc, const LeaderEpoch& epoch) {
+  return STATUS(NotSupported, "Ysql major version upgrade is not supported");
+}
+
 namespace {
 
 Status ValidateCreateTableSchema(const Schema& schema, CreateTableResponsePB* resp) {
diff --git a/src/yb/master/catalog_manager.h b/src/yb/master/catalog_manager.h
index a443a3c7294c..2a34a5056330 100644
--- a/src/yb/master/catalog_manager.h
+++ b/src/yb/master/catalog_manager.h
@@ -1098,6 +1098,21 @@ class CatalogManager : public tserver::TabletPeerLookupIf,
   Status DdlLog(
       const DdlLogRequestPB* req, DdlLogResponsePB* resp, rpc::RpcContext* rpc);
 
+  // Not implemented.
+  Status StartYsqlMajorVersionUpgradeInitdb(const StartYsqlMajorVersionUpgradeInitdbRequestPB* req,
+                                            StartYsqlMajorVersionUpgradeInitdbResponsePB* resp,
+                                            rpc::RpcContext* rpc, const LeaderEpoch& epoch);
+
+  // Not implemented.
+  Status IsYsqlMajorVersionUpgradeInitdbDone(
+      const IsYsqlMajorVersionUpgradeInitdbDoneRequestPB* req,
+      IsYsqlMajorVersionUpgradeInitdbDoneResponsePB* resp, rpc::RpcContext* rpc);
+
+  // Not implemented.
+  Status RollbackYsqlMajorVersionUpgrade(const RollbackYsqlMajorVersionUpgradeRequestPB* req,
+                                         RollbackYsqlMajorVersionUpgradeResponsePB* resp,
+                                         rpc::RpcContext* rpc, const LeaderEpoch& epoch);
+
   // Test wrapper around protected DoSplitTablet method.
   Status TEST_SplitTablet(
       const TabletInfoPtr& source_tablet_info,
diff --git a/src/yb/master/master_admin.proto b/src/yb/master/master_admin.proto
index 5a3c544d7ced..43b8448e1630 100644
--- a/src/yb/master/master_admin.proto
+++ b/src/yb/master/master_admin.proto
@@ -177,6 +177,29 @@ message DdlLogResponsePB {
   repeated DdlLogEntryPB entries = 2;
 }
 
+message StartYsqlMajorVersionUpgradeInitdbRequestPB {
+}
+
+message StartYsqlMajorVersionUpgradeInitdbResponsePB {
+  optional MasterErrorPB error = 1;
+}
+
+message IsYsqlMajorVersionUpgradeInitdbDoneRequestPB {
+}
+
+message IsYsqlMajorVersionUpgradeInitdbDoneResponsePB {
+  optional MasterErrorPB error = 1;
+  optional bool done = 2;
+  optional MasterErrorPB initdb_error = 3;
+}
+
+message RollbackYsqlMajorVersionUpgradeRequestPB {
+}
+
+message RollbackYsqlMajorVersionUpgradeResponsePB {
+  optional MasterErrorPB error = 1;
+}
+
 message CheckIfPitrActiveRequestPB {}
 
 message CheckIfPitrActiveResponsePB {
@@ -268,6 +291,13 @@ service MasterAdmin {
 
   rpc DdlLog(DdlLogRequestPB) returns (DdlLogResponsePB);
 
+  rpc StartYsqlMajorVersionUpgradeInitdb(StartYsqlMajorVersionUpgradeInitdbRequestPB)
+      returns (StartYsqlMajorVersionUpgradeInitdbResponsePB);
+  rpc IsYsqlMajorVersionUpgradeInitdbDone(IsYsqlMajorVersionUpgradeInitdbDoneRequestPB)
+      returns (IsYsqlMajorVersionUpgradeInitdbDoneResponsePB);
+  rpc RollbackYsqlMajorVersionUpgrade(RollbackYsqlMajorVersionUpgradeRequestPB)
+      returns (RollbackYsqlMajorVersionUpgradeResponsePB);
+
   rpc CheckIfPitrActive(CheckIfPitrActiveRequestPB)
       returns (CheckIfPitrActiveResponsePB);
 
diff --git a/src/yb/master/master_admin_service.cc b/src/yb/master/master_admin_service.cc
index 417f27e30739..23748b73ec4c 100644
--- a/src/yb/master/master_admin_service.cc
+++ b/src/yb/master/master_admin_service.cc
@@ -49,6 +49,9 @@ class MasterAdminServiceImpl : public MasterServiceBase, public MasterAdminIf {
       (GetCompactionStatus)
       (CreateTransactionStatusTable)
       (DdlLog)
+      (StartYsqlMajorVersionUpgradeInitdb)
+      (IsYsqlMajorVersionUpgradeInitdbDone)
+      (RollbackYsqlMajorVersionUpgrade)
       (DeleteNotServingTablet)
       (FlushSysCatalog)
       (SplitTablet)