diff --git a/ArcFormats/ArcFormats.csproj b/ArcFormats/ArcFormats.csproj
index 74f504ad..d36417ce 100644
--- a/ArcFormats/ArcFormats.csproj
+++ b/ArcFormats/ArcFormats.csproj
@@ -789,7 +789,7 @@
 exit 0</PreBuildEvent>
   </PropertyGroup>
   <PropertyGroup>
-    <PostBuildEvent>mkdir "$(TargetDir)\GameData"
+    <PostBuildEvent>if not exist "$(TargetDir)\GameData" mkdir "$(TargetDir)\GameData"
 xcopy "$(ProjectDir)\Resources\Formats.dat" "$(TargetDir)\GameData\" /D /Y &gt;NUL</PostBuildEvent>
   </PropertyGroup>
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it.