diff --git a/simgear/scene/tgdb/ReaderWriterSTG.cxx b/simgear/scene/tgdb/ReaderWriterSTG.cxx
index 8344245e..8e7fd2a2 100644
--- a/simgear/scene/tgdb/ReaderWriterSTG.cxx
+++ b/simgear/scene/tgdb/ReaderWriterSTG.cxx
@@ -19,6 +19,10 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 //
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
 #include <simgear/scene/model/ModelRegistry.hxx>
 
 #include <osgDB/Registry>
diff --git a/simgear/scene/tgdb/TileCache.cxx b/simgear/scene/tgdb/TileCache.cxx
index 9004f706..f37533d2 100644
--- a/simgear/scene/tgdb/TileCache.cxx
+++ b/simgear/scene/tgdb/TileCache.cxx
@@ -20,6 +20,10 @@
 //
 // $Id$
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
 #include <simgear/bucket/newbucket.hxx>
 #include <simgear/debug/logstream.hxx>
 #include <simgear/misc/sg_path.hxx>
diff --git a/simgear/scene/tgdb/TileEntry.cxx b/simgear/scene/tgdb/TileEntry.cxx
index 0b4ebfad..2782c023 100644
--- a/simgear/scene/tgdb/TileEntry.cxx
+++ b/simgear/scene/tgdb/TileEntry.cxx
@@ -18,6 +18,10 @@
 // along with this program; if not, write to the Free Software
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
 #include <simgear/compiler.h>
 #include <plib/ul.h>