diff --git a/webinterface.py b/webinterface.py
index 4e66d5ac5..cb74c0ef8 100644
--- a/webinterface.py
+++ b/webinterface.py
@@ -591,6 +591,10 @@ def htmlHashtagSearch(nickname: str, domain: str, port: int,
         hashtag = hashtag[1:]
     hashtag = urllib.parse.unquote(hashtag)
     hashtagIndexFile = baseDir + '/tags/' + hashtag + '.txt'
+    if not os.path.isfile(hashtagIndexFile):
+        if hashtag != hashtag.lower():
+            hashtag = hashtag.lower()
+            hashtagIndexFile = baseDir + '/tags/' + hashtag + '.txt'
     if not os.path.isfile(hashtagIndexFile):
         print('WARN: hashtag file not found ' + hashtagIndexFile)
         return None