diff --git a/Nuclex.Support (xna-4.0-phone7).csproj b/Nuclex.Support (xna-4.0-phone7).csproj
index d7da6ed..01bb5f8 100644
--- a/Nuclex.Support (xna-4.0-phone7).csproj	
+++ b/Nuclex.Support (xna-4.0-phone7).csproj	
@@ -34,7 +34,7 @@
     <DebugType>pdbonly</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\xna-4.0-phone7\Release\</OutputPath>
-    <DefineConstants>TRACE;WINDOWS_PHONE;NO_CLONING;NO_SERIALIZATION;NO_XMLSCHEMA;NO_SYSTEMEVENTS;NO_EXITCONTEXT</DefineConstants>
+    <DefineConstants>TRACE;WINDOWS_PHONE;NO_CLONING;NO_SERIALIZATION;NO_XMLSCHEMA;NO_SYSTEMEVENTS;NO_EXITCONTEXT;NO_SPECIALIZED_COLLECTIONS</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <NoStdLib>true</NoStdLib>
diff --git a/Nuclex.Support (xna-4.0-xbox360).csproj b/Nuclex.Support (xna-4.0-xbox360).csproj
index 93a5b2f..10c8617 100644
--- a/Nuclex.Support (xna-4.0-xbox360).csproj	
+++ b/Nuclex.Support (xna-4.0-xbox360).csproj	
@@ -34,7 +34,7 @@
     <DebugType>pdbonly</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\xna-4.0-xbox360\Release\</OutputPath>
-    <DefineConstants>TRACE;XBOX;XBOX360;NO_CLONING;NO_SERIALIZATION;NO_XMLSCHEMA;NO_SYSTEMEVENTS;NO_EXITCONTEXT</DefineConstants>
+    <DefineConstants>TRACE;XBOX;XBOX360;NO_CLONING;NO_SERIALIZATION;NO_XMLSCHEMA;NO_SYSTEMEVENTS;NO_EXITCONTEXT;NO_SPECIALIZED_COLLECTIONS</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <NoStdLib>true</NoStdLib>