diff --git a/STPSLDemo/STPSLDemo.csproj b/STPSLDemo/STPSLDemo.csproj
index 94db809..2f67624 100644
--- a/STPSLDemo/STPSLDemo.csproj
+++ b/STPSLDemo/STPSLDemo.csproj
@@ -34,7 +34,7 @@
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>Bin\Debug</OutputPath>
-    <DefineConstants>TRACE;DEBUG;SILVERLIGHT=1</DefineConstants>
+    <DefineConstants>TRACE;DEBUG;SILVERLIGHT</DefineConstants>
     <NoStdLib>true</NoStdLib>
     <NoConfig>true</NoConfig>
     <ErrorReport>prompt</ErrorReport>
@@ -44,7 +44,7 @@
     <DebugType>pdbonly</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>Bin\Release</OutputPath>
-    <DefineConstants>TRACE;SILVERLIGHT=1</DefineConstants>
+    <DefineConstants>TRACE;SILVERLIGHT</DefineConstants>
     <NoStdLib>true</NoStdLib>
     <NoConfig>true</NoConfig>
     <ErrorReport>prompt</ErrorReport>