diff --git a/src/ATC/ATCutils.cxx b/src/ATC/ATCutils.cxx
index 14442917e..88657ca31 100644
--- a/src/ATC/ATCutils.cxx
+++ b/src/ATC/ATCutils.cxx
@@ -18,6 +18,10 @@
 // along with this program; if not, write to the Free Software
 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include <math.h>
 #include <simgear/math/point3d.hxx>
 #include <simgear/constants.h>
diff --git a/src/ATC/approach.cxx b/src/ATC/approach.cxx
index 19d6f1d26..c2944ac0c 100644
--- a/src/ATC/approach.cxx
+++ b/src/ATC/approach.cxx
@@ -18,6 +18,10 @@
 // along with this program; if not, write to the Free Software
 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include "approach.hxx"
 #include "transmission.hxx"
 #include "transmissionlist.hxx"
diff --git a/src/ATC/ground.cxx b/src/ATC/ground.cxx
index 32e01c1dd..ab959cd4d 100644
--- a/src/ATC/ground.cxx
+++ b/src/ATC/ground.cxx
@@ -18,6 +18,10 @@
 // along with this program; if not, write to the Free Software
 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include <simgear/misc/sg_path.hxx>
 #include <simgear/math/sg_random.h>
 #include <simgear/debug/logstream.hxx>
diff --git a/src/ATC/transmission.cxx b/src/ATC/transmission.cxx
index b56e76043..ee980823a 100644
--- a/src/ATC/transmission.cxx
+++ b/src/ATC/transmission.cxx
@@ -19,6 +19,10 @@
 // along with this program; if not, write to the Free Software
 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include "transmission.hxx"
 
 #include <simgear/misc/sg_path.hxx>
diff --git a/src/Environment/environment_mgr.cxx b/src/Environment/environment_mgr.cxx
index 46070066c..2275a4795 100644
--- a/src/Environment/environment_mgr.cxx
+++ b/src/Environment/environment_mgr.cxx
@@ -20,6 +20,10 @@
 //
 // $Id$
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include <simgear/debug/logstream.hxx>
 #include <simgear/scene/sky/sky.hxx>
 #include <simgear/environment/visual_enviro.hxx>
diff --git a/src/FDM/MagicCarpet.cxx b/src/FDM/MagicCarpet.cxx
index 2dc4008fd..fc84a6939 100644
--- a/src/FDM/MagicCarpet.cxx
+++ b/src/FDM/MagicCarpet.cxx
@@ -21,6 +21,10 @@
 // $Id$
 
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include <simgear/math/sg_geodesy.hxx>
 #include <simgear/math/point3d.hxx>
 #include <simgear/math/polar3d.hxx>
diff --git a/src/FDM/UFO.cxx b/src/FDM/UFO.cxx
index 357c26258..f6b26f58d 100644
--- a/src/FDM/UFO.cxx
+++ b/src/FDM/UFO.cxx
@@ -21,6 +21,10 @@
 //
 
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include <simgear/math/sg_geodesy.hxx>
 #include <simgear/math/point3d.hxx>
 #include <simgear/math/polar3d.hxx>
diff --git a/src/FDM/UIUCModel/uiuc_gear.cpp b/src/FDM/UIUCModel/uiuc_gear.cpp
index 9edc77fe9..6c67b7957 100644
--- a/src/FDM/UIUCModel/uiuc_gear.cpp
+++ b/src/FDM/UIUCModel/uiuc_gear.cpp
@@ -62,6 +62,10 @@
 
 **********************************************************************/
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include <simgear/compiler.h>
 #include <simgear/misc/sg_path.hxx>
 #include <Aircraft/aircraft.hxx>
diff --git a/src/GUI/layout-test.cxx b/src/GUI/layout-test.cxx
index 075da15a5..bbfa45caf 100644
--- a/src/GUI/layout-test.cxx
+++ b/src/GUI/layout-test.cxx
@@ -1,3 +1,7 @@
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
 #include <iostream>
 
 #include <simgear/compiler.h>
diff --git a/src/Main/globals.cxx b/src/Main/globals.cxx
index 6170dbd85..077a65a03 100644
--- a/src/Main/globals.cxx
+++ b/src/Main/globals.cxx
@@ -20,6 +20,9 @@
 //
 // $Id$
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
 
 #include <simgear/sound/soundmgr_openal.hxx>
 #include <simgear/structure/commands.hxx>
diff --git a/src/Network/multiplay.cxx b/src/Network/multiplay.cxx
index 6772f07c1..0b6118b36 100644
--- a/src/Network/multiplay.cxx
+++ b/src/Network/multiplay.cxx
@@ -20,6 +20,9 @@
 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 //
 
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
 
 #include <simgear/compiler.h>