diff --git a/Sources/FluentKitExtras/SwiftCompatibility.swift b/Sources/FluentKitExtras/SwiftCompatibility.swift
index eabfa97..891bc0b 100644
--- a/Sources/FluentKitExtras/SwiftCompatibility.swift
+++ b/Sources/FluentKitExtras/SwiftCompatibility.swift
@@ -1,9 +1,18 @@
 import FluentKit
 
 #if compiler(>=6.2)
-@_marker public protocol _SQLKitExtrasSendableMetatype: SendableMetatype {}
+public typealias _SQLKitExtrasSendableMetatype = SendableMetatype
 #else
-@_marker public protocol _SQLKitExtrasSendableMetatype {}
+public typealias _SQLKitExtrasSendableMetatype = Any
 #endif
 
-extension FluentKit.FieldProperty: _SQLKitExtrasSendableMetatype {}
+extension FluentKit.BooleanProperty: _SQLKitExtrasSendableMetatype {}
+extension FluentKit.OptionalBooleanProperty: _SQLKitExtrasSendableMetatype {}
+
+extension FlatGroupProperty: _SQLKitExtrasSendableMetatype {}
+extension OptionalPointerProperty: _SQLKitExtrasSendableMetatype {}
+extension OptionalReferenceProperty: _SQLKitExtrasSendableMetatype {}
+extension PointerProperty: _SQLKitExtrasSendableMetatype {}
+extension ReferencesProperty: _SQLKitExtrasSendableMetatype {}
+extension RequiredTimestampProperty: _SQLKitExtrasSendableMetatype {}
+