diff -urw ../drgeo-1.1.0.orig/drgenius_config.h ./drgenius_config.h
--- ../drgeo-1.1.0.orig/drgenius_config.h	2004-04-29 22:05:20.000000000 +0200
+++ ./drgenius_config.h	2017-11-28 21:15:49.000000000 +0100
@@ -25,7 +25,7 @@
 #ifndef DRGENIUS_CONFIG_H
 #define DRGENIUS_CONFIG_H
 
-#include <guile/gh.h>
+#include <guile18/gh.h>
 #include <glade/glade.h>
 #include <gtk/gtk.h>
 #include <gmodule.h>
diff -urw ../drgeo-1.1.0.orig/drgenius_main.cc ./drgenius_main.cc
--- ../drgeo-1.1.0.orig/drgenius_main.cc	2004-04-09 22:00:04.000000000 +0200
+++ ./drgenius_main.cc	2017-11-28 21:15:41.000000000 +0100
@@ -25,7 +25,7 @@
 #include <config.h>
 #include <gtk/gtk.h>
 #include <glade/glade.h>
-#include <guile/gh.h>
+#include <guile18/gh.h>
 #include <libintl.h>
 #include <string.h>
 
diff -urw ../drgeo-1.1.0.orig/drgeo_init.cc ./drgeo_init.cc
--- ../drgeo-1.1.0.orig/drgeo_init.cc	2004-01-20 23:14:46.000000000 +0100
+++ ./drgeo_init.cc	2017-11-28 21:15:41.000000000 +0100
@@ -22,7 +22,7 @@
  * 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include <guile/gh.h>
+#include <guile18/gh.h>
 #include <glib.h>
 
 void
diff -urw ../drgeo-1.1.0.orig/geo/drgeo_scm_api.h ./geo/drgeo_scm_api.h
--- ../drgeo-1.1.0.orig/geo/drgeo_scm_api.h	2003-09-23 22:21:47.000000000 +0200
+++ ./geo/drgeo_scm_api.h	2017-11-28 21:15:49.000000000 +0100
@@ -24,7 +24,7 @@
 #ifndef DRGEO_SCM_API_H
 #define DRGEO_SCM_API_H
 
-#include <guile/gh.h>
+#include <guile18/gh.h>
 
 
 #ifdef __cplusplus
diff -urw ../drgeo-1.1.0.orig/geo/drgeo_scm_helper.h ./geo/drgeo_scm_helper.h
--- ../drgeo-1.1.0.orig/geo/drgeo_scm_helper.h	2003-08-16 21:11:55.000000000 +0200
+++ ./geo/drgeo_scm_helper.h	2017-11-28 21:15:49.000000000 +0100
@@ -25,7 +25,7 @@
 #define DRGEO_SCM_HELPER_H
 
 #include <gtk/gtk.h>
-#include <guile/gh.h>
+#include <guile18/gh.h>
 #include "drgeo_drgeoVector.h"
 
 drgeoPoint & scmCoord2drgeoPoint (SCM x, SCM y);
diff -urw ../drgeo-1.1.0.orig/geo/drgeo_scm_interface.h ./geo/drgeo_scm_interface.h
--- ../drgeo-1.1.0.orig/geo/drgeo_scm_interface.h	2003-10-06 13:42:00.000000000 +0200
+++ ./geo/drgeo_scm_interface.h	2017-11-28 21:15:49.000000000 +0100
@@ -24,7 +24,7 @@
 #ifndef DRGEO_SCM_INTERFACE_H
 #define DRGEO_SCM_INTERFACE_H
 
-#include <guile/gh.h>
+#include <guile18/gh.h>
 #include "drgeo_figure.h"
 
 /* define scm_interface into a class */
diff -urw ../drgeo-1.1.0.orig/geo/drgeo_script.cc ./geo/drgeo_script.cc
--- ../drgeo-1.1.0.orig/geo/drgeo_script.cc	2004-08-25 21:27:03.000000000 +0200
+++ ./geo/drgeo_script.cc	2017-11-28 21:15:48.000000000 +0100
@@ -21,7 +21,7 @@
  * 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
-#include <guile/gh.h>
+#include <guile18/gh.h>
 #include "config.h"
 #include "drgeo_script.h"
 #include "drgeo_drawable.h"
diff -urw ../drgeo-1.1.0.orig/geo/drgeo_script.h ./geo/drgeo_script.h
--- ../drgeo-1.1.0.orig/geo/drgeo_script.h	2003-09-22 18:38:19.000000000 +0200
+++ ./geo/drgeo_script.h	2017-11-28 21:15:50.000000000 +0100
@@ -24,7 +24,7 @@
 #ifndef DRGEO_SCRIPT_H
 #define DRGEO_SCRIPT_H
 
-#include <guile/gh.h>
+#include <guile18/gh.h>
 #include "drgeo_value.h"
 
 class script:public value