diff --git a/simgear/scene/model/SGInteractionAnimation.cxx b/simgear/scene/model/SGInteractionAnimation.cxx
index de96c1e4..956d7b69 100644
--- a/simgear/scene/model/SGInteractionAnimation.cxx
+++ b/simgear/scene/model/SGInteractionAnimation.cxx
@@ -16,6 +16,10 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 //
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
 #include "SGInteractionAnimation.hxx"
 
 #include <osg/Geode>