diff --git a/core/include/tee/fs_htree.h b/core/include/tee/fs_htree.h
index a8e7e3b91f8..a25c670cd2e 100644
--- a/core/include/tee/fs_htree.h
+++ b/core/include/tee/fs_htree.h
@@ -125,6 +125,11 @@ void tee_fs_htree_close(struct tee_fs_htree **ht);
  */
 struct tee_fs_htree_meta *tee_fs_htree_get_meta(struct tee_fs_htree *ht);
 
+/**
+ * tee_fs_htree_meta_set_dirty() - tell hash tree that meta were modified
+ */
+void tee_fs_htree_meta_set_dirty(struct tee_fs_htree *ht);
+
 /**
  * tee_fs_htree_sync_to_storage() - synchronize hash tree to storage
  * @ht:		hash tree
diff --git a/core/tee/fs_htree.c b/core/tee/fs_htree.c
index 59693c23324..71b150b0d86 100644
--- a/core/tee/fs_htree.c
+++ b/core/tee/fs_htree.c
@@ -667,6 +667,11 @@ struct tee_fs_htree_meta *tee_fs_htree_get_meta(struct tee_fs_htree *ht)
 	return &ht->imeta.meta;
 }
 
+void tee_fs_htree_meta_set_dirty(struct tee_fs_htree *ht)
+{
+	ht->dirty = true;
+}
+
 static TEE_Result free_node(struct traverse_arg *targ __unused,
 			    struct htree_node *node)
 {
diff --git a/core/tee/tee_ree_fs.c b/core/tee/tee_ree_fs.c
index b50642778e2..b000da1301c 100644
--- a/core/tee/tee_ree_fs.c
+++ b/core/tee/tee_ree_fs.c
@@ -99,8 +99,10 @@ static TEE_Result out_of_place_write(struct tee_fs_fd *fdp, size_t pos,
 		pos += size_to_write;
 	}
 
-	if (pos > meta->length)
+	if (pos > meta->length) {
 		meta->length = pos;
+		tee_fs_htree_meta_set_dirty(fdp->ht);
+	}
 
 exit:
 	free(block);
@@ -267,6 +269,7 @@ static TEE_Result ree_fs_ftruncate_internal(struct tee_fs_fd *fdp,
 			return res;
 
 		meta->length = new_file_len;
+		tee_fs_htree_meta_set_dirty(fdp->ht);
 	}
 
 	return TEE_SUCCESS;