diff --git a/artiq/devices/runtime.py b/artiq/devices/runtime.py
index 43114c08f..c0ad64fa7 100644
--- a/artiq/devices/runtime.py
+++ b/artiq/devices/runtime.py
@@ -75,7 +75,7 @@ class LinkInterface:
 class Environment(LinkInterface):
     def __init__(self, ref_period):
         self.ref_period = ref_period
-        self.initial_time = 2000
+        self.initial_time = 4000
 
     def emit_object(self):
         tm = lt.TargetMachine.new(triple="or1k", cpu="generic")