diff --git a/Source/MSBuildTools.Unity/Packages/com.microsoft.msbuildforunity/Editor/ProjectGenerator/Scripts/Utilities.cs b/Source/MSBuildTools.Unity/Packages/com.microsoft.msbuildforunity/Editor/ProjectGenerator/Scripts/Utilities.cs
index a1b579c..c82cf9c 100644
--- a/Source/MSBuildTools.Unity/Packages/com.microsoft.msbuildforunity/Editor/ProjectGenerator/Scripts/Utilities.cs
+++ b/Source/MSBuildTools.Unity/Packages/com.microsoft.msbuildforunity/Editor/ProjectGenerator/Scripts/Utilities.cs
@@ -136,7 +136,7 @@ private static AssetImporter GetAssetImporter(string path)
                 if (relativePath.Contains('@'))
                 {
                     string[] parts = relativePath.Split('@');
-                    relativePath = parts[0] + parts[1].Substring(parts[1].IndexOf('\\'));
+                    relativePath = parts[0] + parts[1].Substring(parts[1].IndexOf(Path.DirectorySeparatorChar));
                 }
             }
             else if (path.Contains(PackagesPath))