diff --git a/src/xutf8/utf8Input.c b/src/xutf8/utf8Input.c
index 4108c9f11..0e37485ea 100644
--- a/src/xutf8/utf8Input.c
+++ b/src/xutf8/utf8Input.c
@@ -25,7 +25,7 @@
 
 #if !defined(WIN32) && !defined(__APPLE__)
 
-#include "config.h"
+#include <config.h>
 #include "../../FL/Xutf8.h"
 #include <X11/X.h>
 #include <X11/Xlib.h>
diff --git a/test/CubeMain.cxx b/test/CubeMain.cxx
index d55987754..b2347c87e 100644
--- a/test/CubeMain.cxx
+++ b/test/CubeMain.cxx
@@ -25,7 +25,7 @@
 //     http://www.fltk.org/str.php
 //
 
-#include "config.h"
+#include <config.h>
 #include <FL/Fl.H>
 #include "CubeViewUI.h"
 
diff --git a/test/cube.cxx b/test/cube.cxx
index 511e13799..2e9bf04cf 100644
--- a/test/cube.cxx
+++ b/test/cube.cxx
@@ -27,7 +27,7 @@
 //     http://www.fltk.org/str.php
 //
 
-#include "config.h"
+#include <config.h>
 #include <FL/Fl.H>
 #include <FL/Fl_Window.H>
 #include <FL/Fl_Box.H>
diff --git a/test/fractals.cxx b/test/fractals.cxx
index d0167464b..f6e0fe9e3 100644
--- a/test/fractals.cxx
+++ b/test/fractals.cxx
@@ -29,7 +29,7 @@
 //     http://www.fltk.org/str.php
 //
 
-#include "config.h"
+#include <config.h>
 #if !HAVE_GL || !HAVE_GL_GLU_H
 #include <FL/Fl.H>
 #include <FL/fl_message.H>
diff --git a/test/fullscreen.cxx b/test/fullscreen.cxx
index 67677258b..243a0066f 100644
--- a/test/fullscreen.cxx
+++ b/test/fullscreen.cxx
@@ -56,7 +56,7 @@
 //     http://www.fltk.org/str.php
 //
 
-#include "config.h"
+#include <config.h>
 #include <FL/Fl.H>
 #include <FL/Fl_Single_Window.H>
 #include <FL/Fl_Hor_Slider.H>
diff --git a/test/gl_overlay.cxx b/test/gl_overlay.cxx
index f9cf44313..be39518a8 100644
--- a/test/gl_overlay.cxx
+++ b/test/gl_overlay.cxx
@@ -25,7 +25,7 @@
 //     http://www.fltk.org/str.php
 //
 
-#include "config.h"
+#include <config.h>
 #include <FL/Fl.H>
 #include <FL/Fl_Window.H>
 #include <FL/Fl_Hor_Slider.H>
diff --git a/test/glpuzzle.cxx b/test/glpuzzle.cxx
index 773334d64..d312b3a74 100644
--- a/test/glpuzzle.cxx
+++ b/test/glpuzzle.cxx
@@ -29,7 +29,7 @@
 //
 
 // this block added for fltk's distribtion so it will compile w/o OpenGL:
-#include "config.h"
+#include <config.h>
 #if !HAVE_GL || !HAVE_GL_GLU_H
 #include <FL/Fl.H>
 #include <FL/fl_message.H>
diff --git a/test/list_visuals.cxx b/test/list_visuals.cxx
index ecec46b8d..44e33b64b 100644
--- a/test/list_visuals.cxx
+++ b/test/list_visuals.cxx
@@ -44,7 +44,7 @@ int main(int, char**) {
 
 #else
 
-#include "config.h"
+#include <config.h>
 
 #ifndef Fl_H
 
diff --git a/test/shape.cxx b/test/shape.cxx
index 48486ac42..e68030248 100644
--- a/test/shape.cxx
+++ b/test/shape.cxx
@@ -25,7 +25,7 @@
 //     http://www.fltk.org/str.php
 //
 
-#include "config.h"
+#include <config.h>
 #include <FL/Fl.H>
 #include <FL/Fl_Window.H>
 #include <FL/Fl_Hor_Slider.H>
diff --git a/test/threads.cxx b/test/threads.cxx
index 46e896964..fb59a2765 100644
--- a/test/threads.cxx
+++ b/test/threads.cxx
@@ -25,7 +25,7 @@
 //     http://www.fltk.org/str.php
 //
 
-#include "config.h"
+#include <config.h>
 
 #if HAVE_PTHREAD || defined(WIN32)
 #  include <FL/Fl.H>