diff --git a/searx/search/checker/impl.py b/searx/search/checker/impl.py
index 087ced5c2..b5dff1fd2 100644
--- a/searx/search/checker/impl.py
+++ b/searx/search/checker/impl.py
@@ -36,7 +36,7 @@ HTML_TAGS = [
 
 
 def get_check_no_html():
-    rep = ['<' + tag + '[^\>]*>' for tag in HTML_TAGS]
+    rep = ['<' + tag + r'[^\>]*>' for tag in HTML_TAGS]
     rep += ['</' + tag + '>' for tag in HTML_TAGS]
     pattern = re.compile('|'.join(rep))