diff --git a/src/Instrumentation/HUD/HUD_misc.cxx b/src/Instrumentation/HUD/HUD_misc.cxx
index 81c27f0b5..ac7765592 100644
--- a/src/Instrumentation/HUD/HUD_misc.cxx
+++ b/src/Instrumentation/HUD/HUD_misc.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 <config.h>
+#endif
+
 #include <simgear/props/condition.hxx>
 #include "HUD.hxx"