1 files changed, 1 insertions, 1 deletions

diff --git a/src/lanes.lua b/src/lanes.lua
index 0c544bb..e7b9715 100644
--- a/src/lanes.lua
+++ b/src/lanes.lua
@@ -128,7 +128,6 @@ lanes.configure = function( settings_)
         end
         local settings = core.configure and core.configure( params_checker( settings_)) or core.settings
         local thread_new = assert( core.thread_new)
-        local set_singlethreaded = assert( core.set_singlethreaded)
         local max_prio = assert( core.max_prio)
 
 lanes.ABOUT =
@@ -664,6 +663,7 @@ end
         lanes.linda = core.linda
         lanes.cancel_error = core.cancel_error
         lanes.nameof = core.nameof
+        lanes.set_singlethreaded = core.set_singlethreaded
         lanes.threads = core.threads or function() error "lane tracking is not available" end -- core.threads isn't registered if settings.track_lanes is false
         lanes.set_thread_priority = core.set_thread_priority
         lanes.timer = timer