diff --git a/src/FDM/YASim/YASim.cxx b/src/FDM/YASim/YASim.cxx
index b2906f152..294ddfe35 100644
--- a/src/FDM/YASim/YASim.cxx
+++ b/src/FDM/YASim/YASim.cxx
@@ -146,8 +146,7 @@ void YASim::init()
     }
 
     // Build a filename and parse it
-    SGPath f(globals->get_fg_root());
-    f.append("Aircraft-yasim");
+    SGPath f(fgGetString("/sim/aircraft-dir"));
     f.append(fgGetString("/sim/aero"));
     f.concat(".xml");
     readXML(f.str(), *_fdm);
diff --git a/src/Main/fg_init.cxx b/src/Main/fg_init.cxx
index cae81a4d4..80a9f868d 100644
--- a/src/Main/fg_init.cxx
+++ b/src/Main/fg_init.cxx
@@ -568,6 +568,7 @@ bool fgInitConfig ( int argc, char **argv ) {
 
         string result = fgFindAircraftPath( aircraft_search, aircraft_set );
         if ( !result.empty() ) {
+            fgSetString( "/sim/aircraft-dir", result.c_str() );
             SGPath full_name( result );
             full_name.append( aircraft_set );