diff --git a/projects/VC8/SimGear.vcproj b/projects/VC8/SimGear.vcproj
index fe6dc118..f93eb12a 100755
--- a/projects/VC8/SimGear.vcproj
+++ b/projects/VC8/SimGear.vcproj
@@ -583,6 +583,14 @@
 				RelativePath="..\..\simgear\threads\SGQueue.hxx"
 				>
 			</File>
+			<File
+				RelativePath="..\..\simgear\scene\tgdb\SGReaderWriterBTG.hxx"
+				>
+			</File>
+			<File
+				RelativePath="..\..\simgear\scene\tgdb\SGReaderWriterBTGOptions.hxx"
+				>
+			</File>
 			<File
 				RelativePath="..\..\simgear\structure\SGReferenced.hxx"
 				>
@@ -1131,6 +1139,10 @@
 				RelativePath="..\..\simgear\scene\model\SGOffsetTransform.cxx"
 				>
 			</File>
+			<File
+				RelativePath="..\..\simgear\scene\tgdb\SGReaderWriterBTG.cxx"
+				>
+			</File>
 			<File
 				RelativePath="..\..\simgear\scene\model\SGRotateTransform.cxx"
 				>