diff --git a/MSET9_installer_script/mset9.py b/MSET9_installer_script/mset9.py
index 0e4ba26..7ded25c 100644
--- a/MSET9_installer_script/mset9.py
+++ b/MSET9_installer_script/mset9.py
@@ -288,10 +288,8 @@ def getsize(self, path):
 		def remove(self, path):
 			self.fs.remove(path)
 		def rename(self, src, dst):
-			srcdir = os.path.dirname(src)
-			srcname  = os.path.basename(src)
-			dstdir = os.path.dirname(dst)
-			dstname  = os.path.basename(dst)
+			srcdir, srcname = f"/{src}".rstrip("/").rsplit("/", 1)
+			dstdir, dstname = f"/{dst}".rstrip("/").rsplit("/", 1)
 			if srcdir == dstdir and all(not EightDotThree.is_8dot3_conform(n) for n in [srcname, dstname]):
 				# cursed rename, lfn and same folder only
 				pdentry = self.fs._get_dir_entry(srcdir)