diff --git a/libfdisk/src/context.c b/libfdisk/src/context.c
index 3d0e8754f..5b0fed928 100644
--- a/libfdisk/src/context.c
+++ b/libfdisk/src/context.c
@@ -343,16 +343,12 @@ int fdisk_enable_bootbits_protection(struct fdisk_context *cxt, int enable)
  * @cxt: fdisk context
  * @enable: 1 or 0
  *
- * The library removes all filesystem/RAID signatures before it writes
- * partition table. The probing area where it looks for filesystem/RAID is from
+ * The library removes all PT/filesystem/RAID signatures before it writes
+ * partition table. The probing area where it looks for signatures is from
  * the begin of the disk. The device is wiped by libblkid.
  *
  * See also fdisk_wipe_partition().
  *
- * This is no-op if any collision has not been detected by
- * fdisk_assign_device(). See fdisk_get_collision(). The default is not wipe a
- * device.
- *
  * Returns: 0 on success, < 0 on error.
  */
 int fdisk_enable_wipe(struct fdisk_context *cxt, int enable)
@@ -360,7 +356,7 @@ int fdisk_enable_wipe(struct fdisk_context *cxt, int enable)
 	if (!cxt)
 		return -EINVAL;
 
-	fdisk_set_wipe_area(cxt, 0, cxt->total_sectors * cxt->sector_size, enable);
+	fdisk_set_wipe_area(cxt, 0, cxt->total_sectors, enable);
 	return 0;
 }
 
@@ -377,7 +373,7 @@ int fdisk_has_wipe(struct fdisk_context *cxt)
 	if (!cxt)
 		return 0;
 
-	return fdisk_has_wipe_area(cxt, 0, cxt->total_sectors * cxt->sector_size);
+	return fdisk_has_wipe_area(cxt, 0, cxt->total_sectors);
 }
 
 
diff --git a/libfdisk/src/wipe.c b/libfdisk/src/wipe.c
index 2c91da57f..e773f756d 100644
--- a/libfdisk/src/wipe.c
+++ b/libfdisk/src/wipe.c
@@ -123,8 +123,10 @@ int fdisk_do_wipe(struct fdisk_context *cxt)
                                             (uintmax_t) start, (uintmax_t) size));
 
 		rc = blkid_probe_set_device(pr, cxt->dev_fd, start, size);
-		if (rc)
+		if (rc) {
+			DBG(WIPE, ul_debugobj(wp, "blkid_probe_set_device() failed [rc=%d]", rc));
 			return rc;
+		}
 
 		blkid_probe_enable_superblocks(pr, 1);
 		blkid_probe_set_superblocks_flags(pr, BLKID_SUBLKS_MAGIC);