diff --git a/src/System.IO.Abstractions.Extensions/IFileSystemExtensions.cs b/src/System.IO.Abstractions.Extensions/IFileSystemExtensions.cs
index 654b7b9..6effb16 100644
--- a/src/System.IO.Abstractions.Extensions/IFileSystemExtensions.cs
+++ b/src/System.IO.Abstractions.Extensions/IFileSystemExtensions.cs
@@ -7,7 +7,7 @@ public static class IFileSystemExtensions
         /// </summary>
         /// <param name="fileSystem">FileSystem in use</param>
         /// <returns>An <see cref="IDirectoryInfo"/> for the current directory</returns>
-        public static IDirectoryInfo CurrentDirectory(this FileSystem fileSystem)
+        public static IDirectoryInfo CurrentDirectory(this IFileSystem fileSystem)
         {
             return fileSystem.DirectoryInfo.FromDirectoryName(fileSystem.Directory.GetCurrentDirectory());
         }