diff --git a/.gitignore b/.gitignore
index a4b4eb0..efdea0c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -155,3 +155,4 @@ $RECYCLE.BIN/
 # Mac desktop service store files
 .DS_Store
 /packages
+*.nupkg
diff --git a/NTwain/NTwain.csproj b/NTwain/NTwain.csproj
index bc98a3d..f095da2 100644
--- a/NTwain/NTwain.csproj
+++ b/NTwain/NTwain.csproj
@@ -33,7 +33,7 @@
     <DebugType>pdbonly</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\Release\</OutputPath>
-    <DefineConstants>TRACE</DefineConstants>
+    <DefineConstants>TRACE;WIN32</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <DocumentationFile>bin\Release\NTwain.xml</DocumentationFile>