diff -Naur svgalib-1.9.25.orig/demos/bg_test.c svgalib-1.9.25/demos/bg_test.c
--- svgalib-1.9.25.orig/demos/bg_test.c	2005-07-16 23:59:22.000000000 +0400
+++ svgalib-1.9.25/demos/bg_test.c	2012-06-09 20:28:24.698448313 +0400
@@ -9,6 +9,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <string.h>
 #include <strings.h>
 #include <vga.h>
 #include <vgagl.h>
diff -Naur svgalib-1.9.25.orig/demos/eventtest.c svgalib-1.9.25/demos/eventtest.c
--- svgalib-1.9.25.orig/demos/eventtest.c	2012-06-09 20:26:47.000000000 +0400
+++ svgalib-1.9.25/demos/eventtest.c	2012-06-09 20:26:53.464932538 +0400
@@ -5,6 +5,7 @@
 #include <unistd.h>
 #include <sys/time.h>
 #include <sys/types.h>
+#include <time.h>
 #include <vga.h>
 #include <vgagl.h>
 #include <vgamouse.h>
diff -Naur svgalib-1.9.25.orig/demos/vgatweak.c svgalib-1.9.25/demos/vgatweak.c
--- svgalib-1.9.25.orig/demos/vgatweak.c	2000-08-06 14:20:02.000000000 +0400
+++ svgalib-1.9.25/demos/vgatweak.c	2012-06-09 20:29:51.108801463 +0400
@@ -4,6 +4,7 @@
 
 #include <stdio.h>
 #include <unistd.h>		/* for usleep( long ) */
+#include <stdlib.h>
 #include <string.h>
 #include "vga.h"