diff --git a/tools/gitwash_dumper.py b/tools/gitwash_dumper.py
index cabff5c0a..7472658ec 100755
--- a/tools/gitwash_dumper.py
+++ b/tools/gitwash_dumper.py
@@ -223,7 +223,7 @@ def main():
             out_path,
             cp_globs=(pjoin('gitwash', '*'),),
             rep_globs=('*.rst',),
-            renames=(('\.rst$', options.source_suffix),),
+            renames=((r'\.rst$', options.source_suffix),),
         )
         make_link_targets(
             project_name,