diff -up parted-1.9.0/libparted/labels/vtoc.c.kh1 parted-1.9.0/libparted/labels/vtoc.c
--- parted-1.9.0/libparted/labels/vtoc.c.kh1	2009-08-28 12:17:26.000000000 +0200
+++ parted-1.9.0/libparted/labels/vtoc.c	2009-08-28 12:18:03.000000000 +0200
@@ -263,7 +263,7 @@ vtoc_volume_label_init (volume_label_t *
 	PDEBUG
 	sprintf(buffer, "%84s", " ");
 	vtoc_ebcdic_enc(buffer, buffer, 84);
-	strncpy(vlabel->volkey, buffer, 84);
+	strncpy(vlabel->volkey, buffer, 4);
 }
 
 /*