diff --git a/Source/Core/Core/CMakeLists.txt b/Source/Core/Core/CMakeLists.txt
index 2712a9f951..1f7103009b 100644
--- a/Source/Core/Core/CMakeLists.txt
+++ b/Source/Core/Core/CMakeLists.txt
@@ -72,6 +72,7 @@ set(SRCS
   HLE/HLE.cpp
   HLE/HLE_Misc.cpp
   HLE/HLE_OS.cpp
+  HLE/HLE_VarArgs.cpp
   HW/AudioInterface.cpp
   HW/CPU.cpp
   HW/DSP.cpp
diff --git a/Source/Core/Core/Core.vcxproj b/Source/Core/Core/Core.vcxproj
index 55e2d9c328..a6334c1bb9 100644
--- a/Source/Core/Core/Core.vcxproj
+++ b/Source/Core/Core/Core.vcxproj
@@ -100,6 +100,7 @@
     <ClCompile Include="HLE\HLE.cpp" />
     <ClCompile Include="HLE\HLE_Misc.cpp" />
     <ClCompile Include="HLE\HLE_OS.cpp" />
+    <ClCompile Include="HLE\HLE_VarArgs.cpp" />
     <ClCompile Include="HotkeyManager.cpp" />
     <ClCompile Include="HW\AudioInterface.cpp" />
     <ClCompile Include="HW\CPU.cpp" />
diff --git a/Source/Core/Core/Core.vcxproj.filters b/Source/Core/Core/Core.vcxproj.filters
index 1411269cb1..029ce1d207 100644
--- a/Source/Core/Core/Core.vcxproj.filters
+++ b/Source/Core/Core/Core.vcxproj.filters
@@ -293,6 +293,9 @@
     <ClCompile Include="HLE\HLE_OS.cpp">
       <Filter>HLE</Filter>
     </ClCompile>
+    <ClCompile Include="HLE\HLE_VarArgs.cpp" />
+      <Filter>HLE</Filter>
+    </ClCompile>
     <ClCompile Include="PowerPC\BreakPoints.cpp">
       <Filter>PowerPC</Filter>
     </ClCompile>
diff --git a/Source/Core/Core/HLE/HLE_OS.cpp b/Source/Core/Core/HLE/HLE_OS.cpp
index 547fc7e608..788e21d53b 100644
--- a/Source/Core/Core/HLE/HLE_OS.cpp
+++ b/Source/Core/Core/HLE/HLE_OS.cpp
@@ -95,7 +95,7 @@ std::string GetStringVA(u32 str_reg)
   std::string ArgumentBuffer;
   std::string result;
   std::string string = PowerPC::HostGetString(GPR(str_reg));
-  HLE::VAList ap(GPR(1) + 0x8, str_reg + 1);
+  HLE::SystemVABI::VAList ap(GPR(1) + 0x8, str_reg + 1);
 
   for (size_t i = 0; i < string.size(); i++)
   {
@@ -143,8 +143,8 @@ std::string GetStringVA(u32 str_reg)
         break;
 
       case 'n':
-        PowerPC::HostWrite_U32(static_cast<u32>(result.size()), ap.GetArgT<u32>());
         // %n doesn't output anything, so the result variable is untouched
+        PowerPC::HostWrite_U32(static_cast<u32>(result.size()), ap.GetArgT<u32>());
         break;
 
       default:
diff --git a/Source/Core/Core/HLE/HLE_VarArgs.cpp b/Source/Core/Core/HLE/HLE_VarArgs.cpp
new file mode 100644
index 0000000000..27ac6f7bf2
--- /dev/null
+++ b/Source/Core/Core/HLE/HLE_VarArgs.cpp
@@ -0,0 +1,17 @@
+// Copyright 2017 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "Core/HLE/HLE_VarArgs.h"
+
+HLE::SystemVABI::VAList::~VAList() = default;
+
+u32 HLE::SystemVABI::VAList::GetGPR(u32 gpr) const
+{
+  return GPR(gpr);
+}
+
+double HLE::SystemVABI::VAList::GetFPR(u32 fpr) const
+{
+  return rPS0(fpr);
+}
diff --git a/Source/Core/Core/HLE/HLE_VarArgs.h b/Source/Core/Core/HLE/HLE_VarArgs.h
index 8c31549d70..a76ae76fe3 100644
--- a/Source/Core/Core/HLE/HLE_VarArgs.h
+++ b/Source/Core/Core/HLE/HLE_VarArgs.h
@@ -1,4 +1,4 @@
-// Copyright 2016 Dolphin Emulator Project
+// Copyright 2017 Dolphin Emulator Project
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
@@ -14,6 +14,18 @@
 
 namespace HLE
 {
+namespace SystemVABI
+{
+// SFINAE
+template <typename T>
+constexpr bool IS_ARG_POINTER = std::is_union<T>() || std::is_class<T>();
+template <typename T>
+constexpr bool IS_WORD = std::is_pointer<T>() || (std::is_integral<T>() && sizeof(T) <= 4);
+template <typename T>
+constexpr bool IS_DOUBLE_WORD = std::is_integral<T>() && sizeof(T) == 8;
+template <typename T>
+constexpr bool IS_ARG_REAL = std::is_floating_point<T>();
+
 // See System V ABI (SVR4) for more details
 //  -> 3-18 Parameter Passing
 //  -> 3-21 Variable Argument Lists
@@ -27,17 +39,7 @@ public:
       : m_gpr(gpr), m_fpr(fpr), m_gpr_max(gpr_max), m_fpr_max(fpr_max), m_stack(stack)
   {
   }
-  ~VAList() = default;
-
-  // SFINAE
-  template <typename T>
-  constexpr bool IS_ARG_POINTER = std::is_union<T>() || std::is_class<T>();
-  template <typename T>
-  constexpr bool IS_WORD = std::is_pointer<T>() || (std::is_integral<T>() && sizeof(T) <= 4);
-  template <typename T>
-  constexpr bool IS_DOUBLE_WORD = std::is_integral<T>() && sizeof(T) == 8;
-  template <typename T>
-  constexpr bool IS_ARG_REAL = std::is_floating_point<T>();
+  virtual ~VAList();
 
   // 0 - arg_ARGPOINTER
   template <typename T, typename std::enable_if_t<IS_ARG_POINTER<T>>* = nullptr>
@@ -63,7 +65,7 @@ public:
 
     if (m_gpr <= m_gpr_max)
     {
-      value = GPR(m_gpr);
+      value = GetGPR(m_gpr);
       m_gpr += 1;
     }
     else
@@ -86,7 +88,7 @@ public:
       m_gpr += 1;
     if (m_gpr < m_gpr_max)
     {
-      value = static_cast<u64>(GPR(m_gpr)) << 32 | GPR(m_gpr + 1);
+      value = static_cast<u64>(GetGPR(m_gpr)) << 32 | GetGPR(m_gpr + 1);
       m_gpr += 2;
     }
     else
@@ -107,7 +109,7 @@ public:
 
     if (m_fpr <= m_fpr_max)
     {
-      value = rPS0(m_fpr);
+      value = GetFPR(m_fpr);
       m_fpr += 1;
     }
     else
@@ -134,5 +136,9 @@ private:
   const u32 m_gpr_max = 10;
   const u32 m_fpr_max = 8;
   u32 m_stack;
+
+  virtual u32 GetGPR(u32 gpr) const;
+  virtual double GetFPR(u32 fpr) const;
 };
-}
+}  // namespace SystemVABI
+}  // namespace HLE