diff --git a/yt_dlp/extractor/vk.py b/yt_dlp/extractor/vk.py
index 888ffabb01..4be84b2807 100644
--- a/yt_dlp/extractor/vk.py
+++ b/yt_dlp/extractor/vk.py
@@ -789,7 +789,9 @@ def _real_extract(self, url):
 
             # copied regex from VKWallPostIE
             # XXX: common code should be unified, moved to a class
-            data_audio = re.search(r'data-audio="([^"]+)', webpage)[1]
+            data_audio = self._search_regex(
+                r'data-audio="([^"]+)', webpage, 'data-audio attr', group=1)
+
             meta = self._parse_json(unescapeHTML(data_audio), track_id)
             one_more_id = meta[24]