diff --git a/Sources/StructuredQueriesCore/Never.swift b/Sources/StructuredQueriesCore/Never.swift
index 971af9cb..915a4b4c 100644
--- a/Sources/StructuredQueriesCore/Never.swift
+++ b/Sources/StructuredQueriesCore/Never.swift
@@ -25,3 +25,5 @@ extension Never: Table {
 
   private struct NotDecodable: Error {}
 }
+
+extension Never: _Selection {}
diff --git a/Sources/StructuredQueriesCore/Optional.swift b/Sources/StructuredQueriesCore/Optional.swift
index 0d084333..0788504a 100644
--- a/Sources/StructuredQueriesCore/Optional.swift
+++ b/Sources/StructuredQueriesCore/Optional.swift
@@ -183,6 +183,8 @@ extension Optional: Table, PartialSelectStatement, Statement where Wrapped: Tabl
   public typealias Selection = Wrapped.Selection?
 }
 
+extension Optional: _Selection where Wrapped: _Selection {}
+
 extension Optional: PrimaryKeyedTable where Wrapped: PrimaryKeyedTable {
   public typealias Draft = Wrapped.Draft?
 }
diff --git a/Sources/StructuredQueriesCore/TableAlias.swift b/Sources/StructuredQueriesCore/TableAlias.swift
index fdaedc0a..2caba556 100644
--- a/Sources/StructuredQueriesCore/TableAlias.swift
+++ b/Sources/StructuredQueriesCore/TableAlias.swift
@@ -183,6 +183,8 @@ public struct TableAlias<
   }
 }
 
+extension TableAlias: _Selection where Base: _Selection {}
+
 extension TableAlias: PrimaryKeyedTable where Base: PrimaryKeyedTable {
   public typealias Draft = TableAlias<Base.Draft, Name>
 }