diff --git a/Source/FLTKDialog/CMakeSetupGUIImplementation.cxx b/Source/FLTKDialog/CMakeSetupGUIImplementation.cxx
index 2b07c5722..08ad2e8ed 100644
--- a/Source/FLTKDialog/CMakeSetupGUIImplementation.cxx
+++ b/Source/FLTKDialog/CMakeSetupGUIImplementation.cxx
@@ -1,14 +1,14 @@
 
 #include "CMakeSetupGUIImplementation.h"
-#include "Fl/fl_file_chooser.H"
-#include "Fl/filename.H"
-#include "Fl/fl_ask.H"
+#include "FL/fl_file_chooser.H"
+#include "FL/filename.H"
+#include "FL/fl_ask.H"
 #include "cstring"
 #include "../cmCacheManager.h"
 #include "../cmMakefile.h"
 #include <iostream>
 #include "FLTKPropertyList.h"
-#include "Fl/fl_draw.H"
+#include "FL/fl_draw.H"
 #include "../cmake.h"
 
 
diff --git a/Source/FLTKDialog/FLTKPropertyItemRow.cxx b/Source/FLTKDialog/FLTKPropertyItemRow.cxx
index c48cd5d64..edafb4ed4 100644
--- a/Source/FLTKDialog/FLTKPropertyItemRow.cxx
+++ b/Source/FLTKDialog/FLTKPropertyItemRow.cxx
@@ -1,13 +1,13 @@
 #include "FLTKPropertyItemRow.h"
-#include <Fl/Fl.H>
-#include <Fl/Fl_Window.H>
-#include <Fl/Fl_Button.H>
-#include <Fl/Fl_Box.H>
-#include <Fl/Fl_Input.H>
-#include <Fl/Fl_Tile.H>
-#include <Fl/fl_ask.H>
-#include <Fl/fl_file_chooser.H>
-#include <Fl/Fl_Color_Chooser.H>
+#include <FL/Fl.H>
+#include <FL/Fl_Window.H>
+#include <FL/Fl_Button.H>
+#include <FL/Fl_Box.H>
+#include <FL/Fl_Input.H>
+#include <FL/Fl_Tile.H>
+#include <FL/fl_ask.H>
+#include <FL/fl_file_chooser.H>
+#include <FL/Fl_Color_Chooser.H>
 #include <cstdio>
 
 namespace fltk {
diff --git a/Source/FLTKDialog/FLTKPropertyItemRow.h b/Source/FLTKDialog/FLTKPropertyItemRow.h
index d3adb3ebf..39341665e 100644
--- a/Source/FLTKDialog/FLTKPropertyItemRow.h
+++ b/Source/FLTKDialog/FLTKPropertyItemRow.h
@@ -5,8 +5,8 @@
 #include "FLTKPropertyList.h"
 #include "FLTKPropertyNameButtonWithHelp.h"
 
-#include <Fl/Fl_Tile.H>
-#include <Fl/Fl_Input.H>
+#include <FL/Fl_Tile.H>
+#include <FL/Fl_Input.H>
 
 
 namespace fltk {
diff --git a/Source/FLTKDialog/FLTKPropertyList.cxx b/Source/FLTKDialog/FLTKPropertyList.cxx
index e1651e179..8c4239725 100644
--- a/Source/FLTKDialog/FLTKPropertyList.cxx
+++ b/Source/FLTKDialog/FLTKPropertyList.cxx
@@ -4,11 +4,11 @@
 #include "FLTKPropertyList.h"
 #include "../cmCacheManager.h"
 #include "FLTKPropertyItemRow.h"
-#include "Fl/filename.H"
-#include "Fl/fl_file_chooser.H"
-#include "Fl/Fl_Color_Chooser.H"
-#include "Fl/fl_ask.H"
-#include "Fl/Fl_Button.H"
+#include "FL/filename.H"
+#include "FL/fl_file_chooser.H"
+#include "FL/Fl_Color_Chooser.H"
+#include "FL/fl_ask.H"
+#include "FL/Fl_Button.H"
 #include <cstdio>
 
 namespace fltk {
diff --git a/Source/FLTKDialog/FLTKPropertyNameButtonWithHelp.cxx b/Source/FLTKDialog/FLTKPropertyNameButtonWithHelp.cxx
index 3b8858dbc..1bc9372e6 100644
--- a/Source/FLTKDialog/FLTKPropertyNameButtonWithHelp.cxx
+++ b/Source/FLTKDialog/FLTKPropertyNameButtonWithHelp.cxx
@@ -1,7 +1,7 @@
-#include <FLTKPropertyNameButtonWithHelp.h>
-#include <Fl/Fl.H>
-#include <Fl/fl_ask.H>
-#include <Fl/Fl_Menu_Button.H>
+#include "FLTKPropertyNameButtonWithHelp.h"
+#include <FL/Fl.H>
+#include <FL/fl_ask.H>
+#include <FL/Fl_Menu_Button.H>
 #include "../cmCacheManager.h"
 
 
diff --git a/Source/FLTKDialog/FLTKPropertyNameButtonWithHelp.h b/Source/FLTKDialog/FLTKPropertyNameButtonWithHelp.h
index 12c02984d..09d6e604f 100644
--- a/Source/FLTKDialog/FLTKPropertyNameButtonWithHelp.h
+++ b/Source/FLTKDialog/FLTKPropertyNameButtonWithHelp.h
@@ -1,11 +1,11 @@
 #ifndef  FLTKPropertyNameButtonWithHelp_h
 #define  FLTKPropertyNameButtonWithHelp_h
 
-#include <Fl/Fl_Tile.H>
-#include <Fl/Fl_Input.H>
-#include <Fl/Fl_Box.H>
-#include <Fl/Fl_Button.H>
-#include <Fl/Fl_Window.H>
+#include <FL/Fl_Tile.H>
+#include <FL/Fl_Input.H>
+#include <FL/Fl_Box.H>
+#include <FL/Fl_Button.H>
+#include <FL/Fl_Window.H>
 #include <string>
 
 namespace fltk {