diff --git a/src/calibre/ebooks/pdf/output.py b/src/calibre/ebooks/pdf/output.py
index e76bcdd3d7..230beed9ae 100644
--- a/src/calibre/ebooks/pdf/output.py
+++ b/src/calibre/ebooks/pdf/output.py
@@ -70,7 +70,7 @@ class PDFOutput(OutputFormatPlugin):
         popts.paper_size = paper_size(opts.paper_size)
         popts.orientation = orientation(opts.orientation)
 
-        with TemporaryDirectory('_any2pdf') as oebdir:
+        with TemporaryDirectory('_pdf_out') as oebdir:
             OEBOutput(None).convert(oeb_book, oebdir, input_plugin, opts, log)
 
             opf = glob.glob(os.path.join(oebdir, '*.opf'))[0]
diff --git a/src/calibre/ebooks/pdf/writer.py b/src/calibre/ebooks/pdf/writer.py
index a618213189..2aebd7322c 100644
--- a/src/calibre/ebooks/pdf/writer.py
+++ b/src/calibre/ebooks/pdf/writer.py
@@ -82,7 +82,7 @@ class PDFWriter(QObject):
     def _delete_tmpdir(self):
         if os.path.exists(self.tmp_path):
             shutil.rmtree(self.tmp_path, True)
-            self.tmp_path = PersistentTemporaryDirectory('_any2pdf_parts')
+            self.tmp_path = PersistentTemporaryDirectory('_pdf_out_parts')
 
     def _write(self):
         self.logger.info('Combining individual PDF parts...')