diff -ur grpn-1.1.2.orig/callback_menu.c grpn-1.1.2/callback_menu.c
--- grpn-1.1.2.orig/callback_menu.c	2002-04-04 06:46:10.000000000 +0300
+++ grpn-1.1.2/callback_menu.c	2007-08-18 19:07:41.000000000 +0300
@@ -20,6 +20,7 @@
 /* callback_menu.h  by Paul Wilkins 3/15/97 */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <gtk/gtk.h>
 
 #include "menu.h"
diff -ur grpn-1.1.2.orig/complex.c grpn-1.1.2/complex.c
--- grpn-1.1.2.orig/complex.c	2002-04-04 06:46:10.000000000 +0300
+++ grpn-1.1.2/complex.c	2007-08-18 19:14:56.000000000 +0300
@@ -22,6 +22,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
+#include <string.h>
 
 #include "complex.h"
 #include "real.h"
diff -ur grpn-1.1.2.orig/help.c grpn-1.1.2/help.c
--- grpn-1.1.2.orig/help.c	2002-04-04 06:46:11.000000000 +0300
+++ grpn-1.1.2/help.c	2007-08-18 19:08:02.000000000 +0300
@@ -19,6 +19,7 @@
 */
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <gtk/gtk.h>
 
 #include "help.h"
diff -ur grpn-1.1.2.orig/lcd.c grpn-1.1.2/lcd.c
--- grpn-1.1.2.orig/lcd.c	2002-04-04 06:46:11.000000000 +0300
+++ grpn-1.1.2/lcd.c	2007-08-18 19:06:54.000000000 +0300
@@ -20,6 +20,8 @@
 /* lcd.c   by Paul Wilkins 3/22/97 */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <gtk/gtk.h>
 #include <gdk/gdkkeysyms.h>
 
diff -ur grpn-1.1.2.orig/main.c grpn-1.1.2/main.c
--- grpn-1.1.2.orig/main.c	2002-04-04 06:46:11.000000000 +0300
+++ grpn-1.1.2/main.c	2007-08-18 19:06:20.000000000 +0300
@@ -23,6 +23,7 @@
  */
 
 #include <stdio.h>
+#include <stdlib.h>
 #ifdef USE_GNOME
 #include <gnome.h>
 #endif
diff -ur grpn-1.1.2.orig/mode.c grpn-1.1.2/mode.c
--- grpn-1.1.2.orig/mode.c	2002-04-04 06:46:11.000000000 +0300
+++ grpn-1.1.2/mode.c	2007-08-18 19:08:16.000000000 +0300
@@ -20,6 +20,7 @@
 /* setup mode.c  by Paul Wilkins  2/8/98 */
 
 #include <stdio.h>
+#include <string.h>
 #include <gtk/gtk.h>
 
 #include "mode.h"
diff -ur grpn-1.1.2.orig/process_input.c grpn-1.1.2/process_input.c
--- grpn-1.1.2.orig/process_input.c	2002-04-04 06:46:11.000000000 +0300
+++ grpn-1.1.2/process_input.c	2007-08-18 19:07:31.000000000 +0300
@@ -20,6 +20,7 @@
 /* process_input.c  by Paul Wilkins 3/21/97 */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <gtk/gtk.h>
 #include <gdk/gdkkeysyms.h>
 
diff -ur grpn-1.1.2.orig/run_cmd.c grpn-1.1.2/run_cmd.c
--- grpn-1.1.2.orig/run_cmd.c	2002-04-04 06:46:11.000000000 +0300
+++ grpn-1.1.2/run_cmd.c	2007-08-18 19:15:11.000000000 +0300
@@ -20,6 +20,7 @@
 /* run_cmd.c  by Paul Wilkins */
 
 #include <stdio.h>
+#include <string.h>
 #include <gtk/gtk.h>
 
 #include "buttons.h"