diff --git a/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj b/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj
index 166db71941..b1488ea794 100644
--- a/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj
+++ b/OpenRA.Mods.RA/OpenRA.Mods.RA.csproj
@@ -460,7 +460,8 @@
   <PropertyGroup>
     <PostBuildEvent>mkdir "$(SolutionDir)mods/ra/"
 copy "$(TargetPath)" "$(SolutionDir)mods/ra/"
-copy "thirdparty/FuzzyLogicLibrary.dll" "$(SolutionDir)"
+cd "$(SolutionDir)thirdparty/"
+copy "FuzzyLogicLibrary.dll" "$(SolutionDir)"
 cd "$(SolutionDir)"</PostBuildEvent>
   </PropertyGroup>
-</Project>
+</Project>
\ No newline at end of file