diff --git a/interface/other b/interface/other
index 111896f0b..68e4c3a50 100644
--- a/interface/other
+++ b/interface/other
@@ -3,8 +3,17 @@ Source
 	hash: Byte*
 	api: SourceAPI
 	apiHash: Int
+	_internalOnly_nameHashes: _internalOnly_NameHashes
 	hasMacro: Boolean
 
+_internalOnly_NameHashes
+	regularMembers: _internalOnly_NameHash*
+	implicitMembers: _internalOnly_NameHash*
+
+_internalOnly_NameHash
+	name: String
+	hash: Int
+
 SourceAPI
 	packages : Package*
 	definitions: Definition*