diff --git a/simgear/scene/bvh/BVHGroup.cxx b/simgear/scene/bvh/BVHGroup.cxx
index 4fbba4a3..d444791c 100644
--- a/simgear/scene/bvh/BVHGroup.cxx
+++ b/simgear/scene/bvh/BVHGroup.cxx
@@ -15,6 +15,10 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 //
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
 #include "BVHGroup.hxx"
 
 #include <algorithm>
diff --git a/simgear/scene/bvh/BVHTransform.cxx b/simgear/scene/bvh/BVHTransform.cxx
index 27b615ad..802d8075 100644
--- a/simgear/scene/bvh/BVHTransform.cxx
+++ b/simgear/scene/bvh/BVHTransform.cxx
@@ -15,6 +15,10 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 //
 
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
 #include "BVHTransform.hxx"
 
 #include "BVHVisitor.hxx"