diff --git a/src/fl_scroll_area.cxx b/src/fl_scroll_area.cxx
index 5c045a72c..0eacd7820 100644
--- a/src/fl_scroll_area.cxx
+++ b/src/fl_scroll_area.cxx
@@ -20,7 +20,7 @@
 // a "callback" which is called to draw rectangular areas that are moved
 // into the drawing area.
 
-#include <Fl/Fl_Window_Driver.H>
+#include <FL/Fl_Window_Driver.H>
 
 // scroll a rectangle and redraw the newly exposed portions:
 /**