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-rw-r--r--FL/Fl_Help_Dialog.H1
1 files changed, 1 insertions, 0 deletions
diff --git a/FL/Fl_Help_Dialog.H b/FL/Fl_Help_Dialog.H
index 3d75ea9f7..c5e01dc98 100644
--- a/FL/Fl_Help_Dialog.H
+++ b/FL/Fl_Help_Dialog.H
@@ -26,6 +26,7 @@
#ifndef Fl_Help_Dialog_H
#define Fl_Help_Dialog_H
#include <FL/Fl.H>
+#include <FL/filename.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Group.H>
#include <FL/Fl_Button.H>