diff --git a/libflash/libffs.c b/libflash/libffs.c
index 763e061c7a19..7ae9050e77f2 100644
--- a/libflash/libffs.c
+++ b/libflash/libffs.c
@@ -781,7 +781,7 @@ int ffs_update_act_size(struct ffs_handle *ffs, uint32_t part_idx,
 		FL_DBG("FFS: Entry not found\n");
 		return FFS_ERR_PART_NOT_FOUND;
 	}
-	offset = ent->base;
+	offset = ffs->toc_offset + ffs_hdr_raw_size(part_idx);
 	FL_DBG("FFS: part index %d at offset 0x%08x\n",
 	       part_idx, offset);