diff --git a/projects/VC90/SimGear.vcproj b/projects/VC90/SimGear.vcproj
index 65a82782..535d027d 100644
--- a/projects/VC90/SimGear.vcproj
+++ b/projects/VC90/SimGear.vcproj
@@ -1339,6 +1339,10 @@
 				RelativePath="..\..\simgear\scene\tgdb\apt_signs.hxx"
 				>
 			</File>
+			<File
+				RelativePath="..\..\simgear\scene\tgdb\BucketBox.hxx"
+				>
+			</File>
 			<File
 				RelativePath="..\..\simgear\scene\tgdb\GroundLightManager.cxx"
 				>
@@ -1363,6 +1367,14 @@
 				RelativePath="..\..\simgear\scene\tgdb\pt_lights.hxx"
 				>
 			</File>
+			<File
+				RelativePath="..\..\simgear\scene\tgdb\ReaderWriterSPT.cxx"
+				>
+			</File>
+			<File
+				RelativePath="..\..\simgear\scene\tgdb\ReaderWriterSPT.hxx"
+				>
+			</File>
 			<File
 				RelativePath="..\..\simgear\scene\tgdb\ReaderWriterSTG.cxx"
 				>
@@ -1591,6 +1603,10 @@
 				RelativePath="..\..\simgear\structure\SGSmplstat.hxx"
 				>
 			</File>
+			<File
+				RelativePath="..\..\simgear\structure\Singleton.hxx"
+				>
+			</File>
 			<File
 				RelativePath="..\..\simgear\structure\subsystem_mgr.cxx"
 				>