diff --git a/scrapy/utils/url.py b/scrapy/utils/url.py
index bae5a9433..4d5e9ae82 100644
--- a/scrapy/utils/url.py
+++ b/scrapy/utils/url.py
@@ -31,7 +31,8 @@ def url_is_from_spider(url, spider):
 
 def url_has_any_extension(url, extensions):
     """Return True if the url ends with one of the extensions provided"""
-    return any(parse_url(url).path.lower().endswith(ext) for ext in extensions)
+    lowercase_path = parse_url(url).path.lower()
+    return any(lowercase_path.endswith(ext) for ext in extensions)
 
 def parse_url(url, encoding=None):
     """Return urlparsed url from the given argument (which could be an already