diff --git a/pkg/settings/cresettings/README.md b/pkg/settings/cresettings/README.md
index 87120257d2..d7f84ce6ae 100644
--- a/pkg/settings/cresettings/README.md
+++ b/pkg/settings/cresettings/README.md
@@ -109,6 +109,7 @@ flowchart
 
     subgraph syncer.tryEngineCreate
         CoordinatedEngineEnabled[/CoordinatedEngineEnabled\]:::gate
+        ShardingFailoverEnabled[/ShardingFailoverEnabled\]:::gate
     end
     
     subgraph Engine.init
diff --git a/pkg/settings/cresettings/defaults.json b/pkg/settings/cresettings/defaults.json
index e047845f2e..83476970f5 100644
--- a/pkg/settings/cresettings/defaults.json
+++ b/pkg/settings/cresettings/defaults.json
@@ -7,6 +7,7 @@
 	"CentralizedWorkflowOwnerVerificationEnabled": "false",
 	"RemoteExecutableWorkflowDONBindingEnabled": "false",
 	"CoordinatedEngineEnabled": "false",
+	"ShardingFailoverEnabled": "false",
 	"TenantID": "0",
 	"VaultOrgIdAsSecretOwnerEnabled": "false",
 	"PropagateOrgIDInRequestMetadata": "false",
diff --git a/pkg/settings/cresettings/defaults.toml b/pkg/settings/cresettings/defaults.toml
index 7311ee04e6..ce84fa128f 100644
--- a/pkg/settings/cresettings/defaults.toml
+++ b/pkg/settings/cresettings/defaults.toml
@@ -6,6 +6,7 @@ VaultJWTAuthEnabled = 'false'
 CentralizedWorkflowOwnerVerificationEnabled = 'false'
 RemoteExecutableWorkflowDONBindingEnabled = 'false'
 CoordinatedEngineEnabled = 'false'
+ShardingFailoverEnabled = 'false'
 TenantID = '0'
 VaultOrgIdAsSecretOwnerEnabled = 'false'
 PropagateOrgIDInRequestMetadata = 'false'
diff --git a/pkg/settings/cresettings/settings.go b/pkg/settings/cresettings/settings.go
index 458253b058..06301d40a6 100644
--- a/pkg/settings/cresettings/settings.go
+++ b/pkg/settings/cresettings/settings.go
@@ -61,6 +61,7 @@ var Default = Schema{
 	CentralizedWorkflowOwnerVerificationEnabled: Bool(false),
 	RemoteExecutableWorkflowDONBindingEnabled:   Bool(false),
 	CoordinatedEngineEnabled:                    Bool(false),
+	ShardingFailoverEnabled:                     Bool(false),
 	TenantID:                                    Uint64(0),
 	// Deprecated: retained for backwards compatibility; workflow owner identifies secret ownership.
 	VaultOrgIdAsSecretOwnerEnabled:  Bool(false),
@@ -386,7 +387,12 @@ type Schema struct {
 	RemoteExecutableWorkflowDONBindingEnabled Setting[bool]
 	// CoordinatedEngineEnabled selects the coordinated engine over the legacy
 	// trigger-owning Engine for newly created workflows.
-	CoordinatedEngineEnabled        Setting[bool]
+	CoordinatedEngineEnabled Setting[bool]
+	// ShardingFailoverEnabled, when true, makes a sharded workflow DON cache
+	// trigger events for workflows owned by another shard (instead of dropping
+	// them) so it can take over execution if the owning shard fails. Only
+	// applies when sharding is enabled on the node.
+	ShardingFailoverEnabled         Setting[bool]
 	TenantID                        Setting[uint64]
 	VaultOrgIdAsSecretOwnerEnabled  Setting[bool] // Deprecated
 	PropagateOrgIDInRequestMetadata Setting[bool]