diff --git a/projects/VC7.1/FlightGear.vcproj b/projects/VC7.1/FlightGear.vcproj
index 2741f318c..2feb833d2 100755
--- a/projects/VC7.1/FlightGear.vcproj
+++ b/projects/VC7.1/FlightGear.vcproj
@@ -1800,19 +1800,18 @@
 			<File
 				RelativePath="..\..\src\Gui\property_list.hxx">
 			</File>
-			<File
-				RelativePath="..\..\src\GUI\trackball.c">
-			</File>
-			<File
-				RelativePath="..\..\src\GUI\trackball.h">
-			</File>
 			<File
 				RelativePath="..\..\src\GUI\SafeTexFont.cxx">
 			</File>
 			<File
 				RelativePath="..\..\src\GUI\SafeTexFont.hxx">
 			</File>
-
+			<File
+				RelativePath="..\..\src\GUI\trackball.c">
+			</File>
+			<File
+				RelativePath="..\..\src\GUI\trackball.h">
+			</File>
 		</Filter>
 		<Filter
 			Name="Lib_Input"
@@ -1938,6 +1937,12 @@
 			<File
 				RelativePath="..\..\src\Main\ViewPartitionNode.hxx">
 			</File>
+			<File
+				RelativePath="..\..\src\Main\WindowSystemAdapter.cxx">
+			</File>
+			<File
+				RelativePath="..\..\src\Main\WindowSystemAdapter.hxx">
+			</File>
 		</Filter>
 		<Filter
 			Name="Lib_Navaids"