diff --git a/src/osd/OSDMap.cc b/src/osd/OSDMap.cc
index afde1d058d2..3ca1181275d 100644
--- a/src/osd/OSDMap.cc
+++ b/src/osd/OSDMap.cc
@@ -3868,6 +3868,9 @@ int OSDMap::build_simple_optioned(CephContext *cct, epoch_t e, uuid_d &fsid,
       pools[pool].last_change = epoch;
       pools[pool].application_metadata.insert(
         {pg_pool_t::APPLICATION_NAME_RBD, {}});
+      auto m = pg_pool_t::get_pg_autoscale_mode_by_name(
+        cct->_conf.get_val<string>("osd_pool_default_pg_autoscale_mode"));
+      pools[pool].pg_autoscale_mode = m >= 0 ? m : 0;
       pool_name[pool] = plname;
       name_pool[plname] = pool;
     }
diff --git a/src/test/cli/osdmaptool/clobber.t b/src/test/cli/osdmaptool/clobber.t
index 29351f1fc44..f4e4ac628f9 100644
--- a/src/test/cli/osdmaptool/clobber.t
+++ b/src/test/cli/osdmaptool/clobber.t
@@ -25,7 +25,7 @@
   nearfull_ratio 0
   min_compat_client jewel
   
-  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 192 pgp_num 192 last_change 0 flags hashpspool stripe_width 0 application rbd
+  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 192 pgp_num 192 autoscale_mode warn last_change 0 flags hashpspool stripe_width 0 application rbd
   
   max_osd 3
   
@@ -51,7 +51,7 @@
   nearfull_ratio 0
   min_compat_client jewel
   
-  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 64 pgp_num 64 last_change 0 flags hashpspool stripe_width 0 application rbd
+  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 64 pgp_num 64 autoscale_mode warn last_change 0 flags hashpspool stripe_width 0 application rbd
   
   max_osd 1
   
diff --git a/src/test/cli/osdmaptool/create-print.t b/src/test/cli/osdmaptool/create-print.t
index 88e7918a1f2..4ea8050e72f 100644
--- a/src/test/cli/osdmaptool/create-print.t
+++ b/src/test/cli/osdmaptool/create-print.t
@@ -84,7 +84,7 @@
   nearfull_ratio 0
   min_compat_client jewel
   
-  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 192 pgp_num 192 last_change 0 flags hashpspool stripe_width 0 application rbd
+  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 192 pgp_num 192 autoscale_mode warn last_change 0 flags hashpspool stripe_width 0 application rbd
   
   max_osd 3
   
@@ -93,5 +93,5 @@
   osdmaptool: writing epoch 1 to myosdmap
   $ osdmaptool --print myosdmap | grep 'pool 1'
   osdmaptool: osdmap file 'myosdmap'
-  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 192 pgp_num 192 last_change 0 flags hashpspool stripe_width 0 application rbd
+  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 192 pgp_num 192 autoscale_mode warn last_change 0 flags hashpspool stripe_width 0 application rbd
   $ rm -f myosdmap
diff --git a/src/test/cli/osdmaptool/create-racks.t b/src/test/cli/osdmaptool/create-racks.t
index fb13da65fc9..a7c59f02b9c 100644
--- a/src/test/cli/osdmaptool/create-racks.t
+++ b/src/test/cli/osdmaptool/create-racks.t
@@ -796,7 +796,7 @@
   nearfull_ratio 0
   min_compat_client jewel
   
-  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 15296 pgp_num 15296 last_change 0 flags hashpspool stripe_width 0 application rbd
+  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 15296 pgp_num 15296 autoscale_mode warn last_change 0 flags hashpspool stripe_width 0 application rbd
   
   max_osd 239
   
@@ -806,5 +806,5 @@
   osdmaptool: writing epoch 1 to om
   $ osdmaptool --print om | grep 'pool 1'
   osdmaptool: osdmap file 'om'
-  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 15296 pgp_num 15296 last_change 0 flags hashpspool stripe_width 0 application rbd
+  pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 15296 pgp_num 15296 autoscale_mode warn last_change 0 flags hashpspool stripe_width 0 application rbd
   $ rm -f om