diff --git a/soc/targets/artiq_kc705.py b/soc/targets/artiq_kc705.py
index e3bb0095b..c48bdb099 100644
--- a/soc/targets/artiq_kc705.py
+++ b/soc/targets/artiq_kc705.py
@@ -103,4 +103,4 @@ class AMP(_Peripherals):
         self.kernel_cpu.add_wb_slave(mem_decoder(0xb0000000), self.dds.bus)
 
 
-default_subtarget = UP
+default_subtarget = AMP