diff --git a/kernel-shared/print-tree.c b/kernel-shared/print-tree.c
index 5c3d1429..6b5fd37a 100644
--- a/kernel-shared/print-tree.c
+++ b/kernel-shared/print-tree.c
@@ -1689,6 +1689,9 @@ static struct readable_flag_entry incompat_flags_array[] = {
 	DEF_INCOMPAT_FLAG_ENTRY(METADATA_UUID),
 	DEF_INCOMPAT_FLAG_ENTRY(RAID1C34),
 	DEF_INCOMPAT_FLAG_ENTRY(ZONED),
+#if EXPERIMENTAL
+	DEF_INCOMPAT_FLAG_ENTRY(EXTENT_TREE_V2),
+#endif
 };
 static const int incompat_flags_num = sizeof(incompat_flags_array) /
 				      sizeof(struct readable_flag_entry);