diff --git a/src/EdgeDB.Net.Driver/Binary/Protocol/V2.0/Descriptors/IMetadataDescriptor.cs b/src/EdgeDB.Net.Driver/Binary/Protocol/V2.0/Descriptors/IMetadataDescriptor.cs
index f197584e..553dcadb 100644
--- a/src/EdgeDB.Net.Driver/Binary/Protocol/V2.0/Descriptors/IMetadataDescriptor.cs
+++ b/src/EdgeDB.Net.Driver/Binary/Protocol/V2.0/Descriptors/IMetadataDescriptor.cs
@@ -17,8 +17,8 @@ static CodecAncestor[] ConstructAncestors(ushort[] ancestors, RelativeCodecDeleg
             for (var i = 0; i != ancestors.Length; i++)
             {
                 codecAncestors[i] = new CodecAncestor(
-                    ref relativeCodec(in i),
-                    ref relativeDescriptor(in i)
+                    ref relativeCodec(ancestors[i]),
+                    ref relativeDescriptor(ancestors[i])
                 );
             }