diff --git a/mvw-dl.py b/mvw-dl.py
index f5509e3..acfea6a 100644
--- a/mvw-dl.py
+++ b/mvw-dl.py
@@ -374,13 +374,17 @@ def filename_replace_pattern(
     show_attrs = [attr for attr in dir(show) if not attr.startswith('_') and not callable(getattr(show, attr))]
 
     for attr in show_attrs:
-        # log.debug(f"{shorthand_uuid} Replacing filename pattern '&({attr})s' ...")
-        filename = re.sub(r"&\(" + re.escape(attr) + r"\)s", str(getattr(show, attr)), filename)
-        # log.debug(f"{shorthand_uuid} New filename: '{filename}'")
+        attr_re = re.compile(r"&\(" + re.escape(attr) + r"\)s")
+        if re.search(attr_re, filename):
+            log.debug(f"{shorthand_uuid} Replacing filename pattern '&({attr})s' ...")
+            filename = re.sub(attr_re, str(getattr(show, attr)), filename)
+            log.debug(f"{shorthand_uuid} New filename: '{filename}'")
     for extended_attr in show_extended:
-        # log.debug(f"{shorthand_uuid} Replacing filename pattern '&({extended_attr})s' ...")
-        filename = re.sub(r"&\(" + re.escape(extended_attr) + r"\)s", show_extended[extended_attr], filename)
-        # log.debug(f"{shorthand_uuid} New filename: '{filename}'")
+        extended_attr_re = re.compile(r"&\(" + re.escape(extended_attr) + r"\)s")
+        if re.search(extended_attr_re, filename):
+            log.debug(f"{shorthand_uuid} Replacing filename pattern '&({extended_attr})s' ...")
+            filename = re.sub(extended_attr_re, show_extended[extended_attr], filename)
+            log.debug(f"{shorthand_uuid} New filename: '{filename}'")
     return filename