diff --git a/src/Storages/MergeTree/MergeTreeSettings.h b/src/Storages/MergeTree/MergeTreeSettings.h
index 9675c6e303c..9de3350e8d9 100644
--- a/src/Storages/MergeTree/MergeTreeSettings.h
+++ b/src/Storages/MergeTree/MergeTreeSettings.h
@@ -85,7 +85,7 @@ struct Settings;
     M(Int64, merge_with_ttl_timeout, 3600 * 24, "Minimal time in seconds, when merge with TTL can be repeated.", 0) \
     M(Bool, ttl_only_drop_parts, false, "Only drop altogether the expired parts and not partially prune them.", 0) \
     M(Bool, write_final_mark, 1, "Write final mark after end of column (0 - disabled, do nothing if index_granularity_bytes=0)", 0) \
-    M(Bool, enable_mixed_granularity_parts, 0, "Enable parts with adaptive and non adaptive granularity", 0) \
+    M(Bool, enable_mixed_granularity_parts, 1, "Enable parts with adaptive and non adaptive granularity", 0) \
     M(MaxThreads, max_part_loading_threads, 0, "The number of threads to load data parts at startup.", 0) \
     M(MaxThreads, max_part_removal_threads, 0, "The number of threads for concurrent removal of inactive data parts. One is usually enough, but in 'Google Compute Environment SSD Persistent Disks' file removal (unlink) operation is extraordinarily slow and you probably have to increase this number (recommended is up to 16).", 0) \
     M(UInt64, concurrent_part_removal_threshold, 100, "Activate concurrent part removal (see 'max_part_removal_threads') only if the number of inactive data parts is at least this.", 0) \