diff --git a/DS4Windows/DS4Windows.csproj b/DS4Windows/DS4Windows.csproj
index a69e73e..1fff1f5 100644
--- a/DS4Windows/DS4Windows.csproj
+++ b/DS4Windows/DS4Windows.csproj
@@ -87,7 +87,7 @@
     <UseVSHostingProcess>false</UseVSHostingProcess>
     <ErrorReport>prompt</ErrorReport>
     <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
-    <DefineConstants>PLATFORM_X64</DefineConstants>
+    <DefineConstants>WIN64</DefineConstants>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
     <DebugSymbols>true</DebugSymbols>
diff --git a/DS4Windows/HidLibrary/HidDevice.cs b/DS4Windows/HidLibrary/HidDevice.cs
index fcf496e..b435721 100644
--- a/DS4Windows/HidLibrary/HidDevice.cs
+++ b/DS4Windows/HidLibrary/HidDevice.cs
@@ -492,7 +492,7 @@ namespace DS4Windows
             else
             {
                 byte[] buffer = new byte[126];
-#if PLATFORM_X64
+#if WIN64
                 ulong bufferLen = 126;
 #else
                 uint bufferLen = 126;
diff --git a/DS4Windows/HidLibrary/NativeMethods.cs b/DS4Windows/HidLibrary/NativeMethods.cs
index c6b30b9..35d656a 100644
--- a/DS4Windows/HidLibrary/NativeMethods.cs
+++ b/DS4Windows/HidLibrary/NativeMethods.cs
@@ -391,7 +391,7 @@ namespace DS4Windows
 	    [DllImport("hid.dll")]
 	    static internal extern int HidP_GetValueCaps(short reportType, ref byte valueCaps, ref short valueCapsLength, IntPtr preparsedData);
 
-#if PLATFORM_X64
+#if WIN64
         [DllImport("hid.dll")]
         static internal extern bool HidD_GetSerialNumberString(IntPtr HidDeviceObject, byte[] Buffer, ulong BufferLength);
 #else