Index: trunk/src_plugins/hid_gtk2_gl/gtkhid-gl.c
===================================================================
--- trunk/src_plugins/hid_gtk2_gl/gtkhid-gl.c	(revision 15262)
+++ trunk/src_plugins/hid_gtk2_gl/gtkhid-gl.c	(revision 15263)
@@ -17,6 +17,7 @@
 #include "../src_plugins/lib_gtk_hid/gui.h"
 #include "../src_plugins/lib_gtk_hid/coord_conv.h"
 #include "../src_plugins/lib_gtk_hid/render.h"
+#include "../src_plugins/lib_gtk_hid/preview_helper.h"
 
 #include "../src_plugins/lib_hid_gl/opengl.h"
 #include <gtk/gtkgl.h>
Index: trunk/src_plugins/hid_gtk3_cairo/gtkhid-cairo.c
===================================================================
--- trunk/src_plugins/hid_gtk3_cairo/gtkhid-cairo.c	(revision 15262)
+++ trunk/src_plugins/hid_gtk3_cairo/gtkhid-cairo.c	(revision 15263)
@@ -42,6 +42,7 @@
 
 #include "../src_plugins/lib_gtk_hid/gui.h"
 #include "../src_plugins/lib_gtk_hid/coord_conv.h"
+#include "../src_plugins/lib_gtk_hid/preview_helper.h"
 
 #include "../src_plugins/lib_gtk_config/hid_gtk_conf.h"
 #include "../src_plugins/lib_gtk_config/lib_gtk_config.h"