diff --git a/scripts/hetero_big_little.py b/scripts/hetero_big_little.py
index 01fe25b..130e2e0 100755
--- a/scripts/hetero_big_little.py
+++ b/scripts/hetero_big_little.py
@@ -73,9 +73,9 @@ if args.drowsy:
 # -------------------------------
 # Memory controller
 # -------------------------------
-system.mem_ctrl = DDR3_1600_8x8()
+system.mem_ctrl = SimpleMemory()
 system.mem_ctrl.range = system.mem_ranges[0]
-system.mem_ctrl.mem_side = system.membus.master
+system.mem_ctrl.port = system.membus.master
 system.system_port = system.membus.slave
 
 # -------------------------------