diff --git a/projects/VC7.1/SimGear.vcproj b/projects/VC7.1/SimGear.vcproj
index 95f6fd09..0b94002c 100755
--- a/projects/VC7.1/SimGear.vcproj
+++ b/projects/VC7.1/SimGear.vcproj
@@ -323,6 +323,9 @@
 			<File
 				RelativePath="..\..\simgear\math\sg_types.hxx">
 			</File>
+			<File
+				RelativePath="..\..\simgear\math\SGGeod.cxx">
+			</File>
 			<File
 				RelativePath="..\..\simgear\math\SGGeodesy.cxx">
 			</File>
@@ -1066,6 +1069,12 @@
 			<File
 				RelativePath="..\..\simgear\environment\metar.hxx">
 			</File>
+			<File
+				RelativePath="..\..\simgear\environment\precipitation.cxx">
+			</File>
+			<File
+				RelativePath="..\..\simgear\environment\precipitation.hxx">
+			</File>
 			<File
 				RelativePath="..\..\simgear\environment\visual_enviro.cxx">
 			</File>