diff --git a/configs/common/FSConfig.py b/configs/common/FSConfig.py
index fa383bb..1a4e381 100644
--- a/configs/common/FSConfig.py
+++ b/configs/common/FSConfig.py
@@ -236,6 +236,7 @@
     # variable might have been an alias.
     machine_type = platform_class.__name__
     self.realview = platform_class()
+    self._bootmem = self.realview.bootmem
 
     if isinstance(self.realview, VExpress_EMM64):
         if os.path.split(mdesc.disk())[-1] == 'linux-aarch32-ael.img':
diff --git a/configs/example/fs.py b/configs/example/fs.py
index 9216f70..c927319 100644
--- a/configs/example/fs.py
+++ b/configs/example/fs.py
@@ -149,7 +149,7 @@
         test_sys.kvm_vm = KvmVM()
 
     if options.ruby:
-        bootmem = getattr(test_sys, 'bootmem', None)
+        bootmem = getattr(test_sys, '_bootmem', None)
         Ruby.create_system(options, True, test_sys, test_sys.iobus,
                            test_sys._dma_ports, bootmem)
 
diff --git a/tests/configs/base_config.py b/tests/configs/base_config.py
index 2bed5f6..d79496d 100644
--- a/tests/configs/base_config.py
+++ b/tests/configs/base_config.py
@@ -170,7 +170,7 @@
             options.num_cpus = self.num_cpus
             options.num_dirs = 2
 
-            bootmem = getattr(system, 'bootmem', None)
+            bootmem = getattr(system, '_bootmem', None)
             Ruby.create_system(options, True, system, system.iobus,
                                system._dma_ports, bootmem)