diff --git a/async.lua b/async.lua
index c350dae..ec3d0ac 100644
--- a/async.lua
+++ b/async.lua
@@ -138,4 +138,9 @@ function async:add_interval(f, delay)
 	end)
 end
 
+function async.stall()
+	return coroutine.yield("stall")
+end
+
+
 return async