diff --git a/src/arch/arm/system.cc b/src/arch/arm/system.cc
index f9bfdec929..56ee98ded6 100644
--- a/src/arch/arm/system.cc
+++ b/src/arch/arm/system.cc
@@ -50,7 +50,6 @@
 #include "dev/arm/gic_v2.hh"
 #include "mem/fs_translating_port_proxy.hh"
 #include "mem/physical.hh"
-#include "sim/full_system.hh"
 
 using namespace std;
 using namespace Linux;
@@ -180,13 +179,6 @@ ArmSystem::initState()
     }
 }
 
-ArmSystem*
-ArmSystem::getArmSystem(ThreadContext *tc)
-{
-    assert(FullSystem);
-    return static_cast<ArmSystem *>(tc->getSystemPtr());
-}
-
 bool
 ArmSystem::haveSecurity(ThreadContext *tc)
 {
diff --git a/src/arch/arm/system.hh b/src/arch/arm/system.hh
index 26b417ed78..6331af283b 100644
--- a/src/arch/arm/system.hh
+++ b/src/arch/arm/system.hh
@@ -48,6 +48,7 @@
 #include "kern/linux/events.hh"
 #include "params/ArmSystem.hh"
 #include "params/GenericArmSystem.hh"
+#include "sim/full_system.hh"
 #include "sim/sim_object.hh"
 #include "sim/system.hh"
 
@@ -274,7 +275,12 @@ class ArmSystem : public System
      * Returns a valid ArmSystem pointer if using ARM ISA, it fails
      * otherwise.
      */
-    static ArmSystem* getArmSystem(ThreadContext *tc);
+    static ArmSystem*
+    getArmSystem(ThreadContext *tc)
+    {
+        assert(FullSystem);
+        return static_cast<ArmSystem *>(tc->getSystemPtr());
+    }
 
     /** Returns true if the system of a specific thread context implements the
      * Security Extensions