diff -ur simgear-2020.3.17.orig/simgear/scene/viewer/Compositor.hxx simgear-2020.3.17/simgear/scene/viewer/Compositor.hxx
--- simgear-2020.3.17.orig/simgear/scene/viewer/Compositor.hxx	2022-11-20 19:01:30.000000000 +0100
+++ simgear-2020.3.17/simgear/scene/viewer/Compositor.hxx	2023-03-10 18:40:59.219808993 +0100
@@ -17,6 +17,7 @@
 #ifndef SG_COMPOSITOR_HXX
 #define SG_COMPOSITOR_HXX
 
+#include <array>
 #include <unordered_map>
 #include <vector>