diff --git a/libmap/Makefile b/libmap/Makefile
index 89c5154..fbdf422 100644
--- a/libmap/Makefile
+++ b/libmap/Makefile
@@ -28,7 +28,7 @@ SOURCES = map_bootblock_get_type.c map_bootblock_is_valid.c \
 	  map_partition_set_startup.c map_read.c map_seek_driver_partition.c \
 	  map_set_bootinfo.c map_set_driver_info.c map_set_driver_number.c \
 	  map_set_partition_name.c map_set_partition_type.c map_set_startup.c \
-	  map_write.c
+	  map_write.c map_block0_write.c
 
 HEADERS = libmap.h
 
diff --git a/libmap/libmap.h b/libmap/libmap.h
index 87bae11..fbe9de8 100644
--- a/libmap/libmap.h
+++ b/libmap/libmap.h
@@ -180,4 +180,5 @@ extern int map_set_driver_info(map_t *map, int number, int block, int size, int
 extern int map_set_driver_number(map_t *map, int number);
 extern unsigned long map_get_driver_signature(map_t* map);
 extern int emile_block0_write(map_t *map);
+extern int map_block0_write(map_t *map);
 #endif
diff --git a/libmap/map_block0_write.c b/libmap/map_block0_write.c
new file mode 100644
index 0000000..62e47f5
--- /dev/null
+++ b/libmap/map_block0_write.c
@@ -0,0 +1,23 @@
+/*
+ *
+ * (c) 2004-2007 Laurent Vivier <Laurent@lvivier.info>
+ *
+ */
+
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "libmap.h"
+
+int map_block0_write(map_t *map)
+{
+	int ret;
+
+	ret = lseek(map->fd, 0, SEEK_SET);
+	if (ret != 0)
+		return -1;
+
+	ret = write(map->fd, &map->drivers, sizeof(map->drivers));
+
+	return ret;
+}