diff --git a/simgear/misc/sg_dir.cxx b/simgear/misc/sg_dir.cxx
index 99ede3e4..e1a2610f 100644
--- a/simgear/misc/sg_dir.cxx
+++ b/simgear/misc/sg_dir.cxx
@@ -44,6 +44,10 @@ using std::string;
 namespace simgear
 {
 
+Dir::Dir()
+{
+}
+
 Dir::Dir(const SGPath& path) :
   _path(path)
 {
diff --git a/simgear/misc/sg_dir.hxx b/simgear/misc/sg_dir.hxx
index 707053ab..7befbc8c 100644
--- a/simgear/misc/sg_dir.hxx
+++ b/simgear/misc/sg_dir.hxx
@@ -42,6 +42,8 @@ namespace simgear
   class Dir
   {
   public:
+    Dir();
+      
     static Dir current();
     
     /**