diff --git a/projects/VC7.1/SimGear.vcproj b/projects/VC7.1/SimGear.vcproj
index 77292b2c..93aaa1d1 100755
--- a/projects/VC7.1/SimGear.vcproj
+++ b/projects/VC7.1/SimGear.vcproj
@@ -706,6 +706,12 @@
 			<File
 				RelativePath="..\..\simgear\scene\model\placementtrans.hxx">
 			</File>
+			<File
+				RelativePath="..\..\simgear\scene\model\SGClipGroup.cxx">
+			</File>
+			<File
+				RelativePath="..\..\simgear\scene\model\SGClipGroup.hxx">
+			</File>
 			<File
 				RelativePath="..\..\simgear\scene\model\SGMaterialAnimation.cxx">
 			</File>
@@ -909,6 +915,12 @@
 			<File
 				RelativePath="..\..\simgear\structure\SGBinding.hxx">
 			</File>
+			<File
+				RelativePath="..\..\simgear\structure\SGExpression.cxx">
+			</File>
+			<File
+				RelativePath="..\..\simgear\structure\SGExpression.hxx">
+			</File>
 			<File
 				RelativePath="..\..\simgear\structure\SGReferenced.hxx">
 			</File>
@@ -1090,7 +1102,6 @@
 			<File
 				RelativePath="..\..\simgear\scene\util\StateAttributeFactory.hxx">
 			</File>
-
 		</Filter>
 		<File
 			RelativePath="..\..\simgear\simgear_config.h-msvc71">