diff --git a/QuickLook.Native/QuickLook.Native32/DllExport.cpp b/QuickLook.Native/QuickLook.Native32/DllExport.cpp
index 56558ba..279e1bc 100644
--- a/QuickLook.Native/QuickLook.Native32/DllExport.cpp
+++ b/QuickLook.Native/QuickLook.Native32/DllExport.cpp
@@ -25,7 +25,9 @@
 
 EXPORT void Init()
 {
+#ifdef WIN64
 	WoW64HookHelper::Launch();
+#endif
 	DOpus::PrepareMessageWindow();
 }
 
diff --git a/QuickLook.Native/QuickLook.Native32/WoW64HookHelper.cpp b/QuickLook.Native/QuickLook.Native32/WoW64HookHelper.cpp
index 1d24e26..75359fc 100644
--- a/QuickLook.Native/QuickLook.Native32/WoW64HookHelper.cpp
+++ b/QuickLook.Native/QuickLook.Native32/WoW64HookHelper.cpp
@@ -33,6 +33,10 @@ bool WoW64HookHelper::CheckStatus()
 
 bool WoW64HookHelper::Launch()
 {
+#ifndef WIN64
+	return true;
+#endif
+
 	if (CheckStatus())
 		return true;
 
diff --git a/QuickLook.Native/QuickLook.Native64/QuickLook.Native64.vcxproj b/QuickLook.Native/QuickLook.Native64/QuickLook.Native64.vcxproj
index 78eee4b..efe59d5 100644
--- a/QuickLook.Native/QuickLook.Native64/QuickLook.Native64.vcxproj
+++ b/QuickLook.Native/QuickLook.Native64/QuickLook.Native64.vcxproj
@@ -77,6 +77,7 @@
       <Optimization>Disabled</Optimization>
       <SDLCheck>true</SDLCheck>
       <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
+      <PreprocessorDefinitions>WIN64;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">