diff --git a/projects/VC7.1/SimGear.vcproj b/projects/VC7.1/SimGear.vcproj
index 73734489..53616401 100755
--- a/projects/VC7.1/SimGear.vcproj
+++ b/projects/VC7.1/SimGear.vcproj
@@ -982,6 +982,12 @@
 			<File
 				RelativePath="..\..\simgear\scene\util\SGNodeMasks.hxx">
 			</File>
+			<File
+				RelativePath="..\..\simgear\scene\util\SGSceneUserData.cxx">
+			</File>
+			<File
+				RelativePath="..\..\simgear\scene\util\SGSceneUserData.hxx">
+			</File>
 			<File
 				RelativePath="..\..\simgear\scene\util\SGStateAttributeVisitor.cxx">
 			</File>
diff --git a/simgear/scene/util/SGSceneUserData.cxx b/simgear/scene/util/SGSceneUserData.cxx
index 7d97c308..c08fce0e 100644
--- a/simgear/scene/util/SGSceneUserData.cxx
+++ b/simgear/scene/util/SGSceneUserData.cxx
@@ -19,6 +19,10 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
 #include "SGSceneUserData.hxx"
 
 SGSceneUserData*