diff --git a/test/makedepend b/test/makedepend
index d7ae903ec..fc5939a17 100644
--- a/test/makedepend
+++ b/test/makedepend
@@ -505,7 +505,7 @@ tree.o: ../FL/Xutf8.h ../FL/Enumerations.H ../FL/Fl_Export.H ../FL/fl_types.h
 tree.o: ../FL/Fl_Pixmap.H ../FL/Fl_Image.H ../FL/Fl_Group.H ../FL/Fl_Tree.H
 tree.o: ../FL/Fl_Scrollbar.H ../FL/Fl_Slider.H ../FL/Fl_Valuator.H
 tree.o: ../FL/fl_draw.H ../FL/Fl_Tree_Item.H ../FL/Fl_Widget.H
-tree.o: ../FL/Fl_Tree_Item_Array.H ../FL/Fl_Tree_Prefs.H ../FL/fl_ask.h
+tree.o: ../FL/Fl_Tree_Item_Array.H ../FL/Fl_Tree_Prefs.H ../FL/fl_ask.H
 tree.o: ../FL/Fl_Double_Window.H ../FL/Fl_Window.H ../FL/Fl_Group.H
 tree.o: ../FL/Fl_Widget.H ../FL/Fl_Value_Slider.H ../FL/Fl_Check_Button.H
 tree.o: ../FL/Fl_Light_Button.H ../FL/Fl_Button.H ../FL/Fl_Choice.H
diff --git a/test/tree.h b/test/tree.h
index e63a4c6f6..8414805bf 100644
--- a/test/tree.h
+++ b/test/tree.h
@@ -8,7 +8,7 @@
 #include <FL/Fl_Pixmap.H>
 #include <FL/Fl_Group.H>
 #include <FL/Fl_Tree.H>
-#include <FL/fl_ask.h>
+#include <FL/fl_ask.H>
 void CccButton_CB(Fl_Widget*, void*data);
 void RebuildTree();
 #include <FL/Fl_Double_Window.H>