diff --git a/artiq/devices/core.py b/artiq/devices/core.py
index 0e0b20eff..56a3e1e51 100644
--- a/artiq/devices/core.py
+++ b/artiq/devices/core.py
@@ -53,7 +53,7 @@ class Core:
         fold_constants(func_def)
         _debug_unparse("fold_constants_1", func_def)
 
-        unroll_loops(func_def, 50)
+        unroll_loops(func_def, 500)
         _debug_unparse("unroll_loops", func_def)
 
         interleave(func_def)