diff --git a/tests/gem5/x86-boot-tests/system/system.py b/tests/gem5/x86-boot-tests/system/system.py
index b050b6f3a0..7b9bd6897a 100755
--- a/tests/gem5/x86-boot-tests/system/system.py
+++ b/tests/gem5/x86-boot-tests/system/system.py
@@ -171,8 +171,8 @@ class MySystem(System):
 
     def _createMemoryControllers(self, num, cls):
         self.mem_cntrls = [
-            cls(range = self.mem_ranges[0],
-                port = self.membus.master)
+            MemCtrl(dram = cls(range = self.mem_ranges[0]),
+                    port = self.membus.master)
             for i in range(num)
         ]