diff --git a/roles/copr/backend/files/provision/files/mock/site-defaults.cfg b/roles/copr/backend/files/provision/files/mock/site-defaults.cfg
index d45d7806b4..9e1d1698ec 100644
--- a/roles/copr/backend/files/provision/files/mock/site-defaults.cfg
+++ b/roles/copr/backend/files/provision/files/mock/site-defaults.cfg
@@ -3,10 +3,7 @@
 config_opts['plugin_conf']['package_state_enable'] = False
 config_opts['plugin_conf']['ccache_enable'] = False
 
-# Disable root cache to not waste disk I/O.  Root cache tarballs were created,
-# but for long time they were not used.
-config_opts['plugin_conf']['root_cache_enable'] = False
-
+config_opts['plugin_conf']['root_cache_enable'] = True
 # when used build ignores additional buildroot packages, reason unknown
 # config_opts['plugin_conf']['root_cache_opts']['age_check'] = False
 config_opts['plugin_conf']['bind_mount_enable'] = False