diff --git a/src/arch/alpha/AlphaSystem.py b/src/arch/alpha/AlphaSystem.py
index f6d9eb4c6..fcbe81edd 100644
--- a/src/arch/alpha/AlphaSystem.py
+++ b/src/arch/alpha/AlphaSystem.py
@@ -27,6 +27,7 @@
 # Authors: Nathan Binkert
 
 from m5.params import *
+from m5.proxy import *
 from System import System
 
 class AlphaSystem(System):
@@ -42,6 +43,9 @@ class LinuxAlphaSystem(AlphaSystem):
     system_type = 34
     system_rev = 1 << 10
 
+    boot_cpu_frequency = Param.Frequency(Self.cpu[0].clock.frequency,
+                                         "boot processor frequency")
+
 class FreebsdAlphaSystem(AlphaSystem):
     type = 'FreebsdAlphaSystem'
     system_type = 34
diff --git a/src/arch/mips/MipsSystem.py b/src/arch/mips/MipsSystem.py
index fc4f1efa3..c8df257e0 100644
--- a/src/arch/mips/MipsSystem.py
+++ b/src/arch/mips/MipsSystem.py
@@ -49,6 +49,9 @@ if buildEnv['FULL_SYSTEM']:
         system_type = 34
         system_rev = 1 << 10
 
+        boot_cpu_frequency = Param.Frequency(Self.cpu[0].clock.frequency,
+                                             "boot processor frequency")
+
     class BareIronMipsSystem(MipsSystem):
         type = 'BareIronMipsSystem'
         bare_iron = True
diff --git a/src/sim/System.py b/src/sim/System.py
index 948be7e77..25643099d 100644
--- a/src/sim/System.py
+++ b/src/sim/System.py
@@ -62,8 +62,6 @@ class System(SimObject):
     work_cpus_ckpt_count = Param.Counter(0,
         "create checkpoint when active cpu count value is reached")
 
-    boot_cpu_frequency = Param.Frequency(Self.cpu[0].clock.frequency,
-                                         "boot processor frequency")
     init_param = Param.UInt64(0, "numerical value to pass into simulator")
     boot_osflags = Param.String("a", "boot flags to pass to the kernel")
     kernel = Param.String("", "file that contains the kernel code")