diff -Naur fireflies-2.08.orig/libgfx/src/gui.cxx fireflies-2.08/libgfx/src/gui.cxx
--- fireflies-2.08.orig/libgfx/src/gui.cxx	2015-10-15 23:55:12.000000000 +0200
+++ fireflies-2.08/libgfx/src/gui.cxx	2025-01-04 00:22:31.207703177 +0100
@@ -13,7 +13,7 @@
 #include <gfx/gui.h>
 #include <gfx/raster.h>
 
-#include <FL/fl_file_chooser.H>
+#include <FL/Fl_File_Chooser.H>
 #include <FL/fl_ask.H>
 
 #include <cstdio>