diff --git a/Lib/robotparser.py b/Lib/robotparser.py
index 447563fe654..730426f6ae7 100644
--- a/Lib/robotparser.py
+++ b/Lib/robotparser.py
@@ -131,7 +131,12 @@ class RobotFileParser:
             return True
         # search for given user agent matches
         # the first match counts
-        url = urllib.quote(urlparse.urlparse(urllib.unquote(url))[2]) or "/"
+        parsed_url = urlparse.urlparse(urllib.unquote(url))
+        url = urlparse.urlunparse(('', '', parsed_url.path,
+            parsed_url.params, parsed_url.query, parsed_url.fragment))
+        url = urllib.quote(url)
+        if not url:
+            url = "/"
         for entry in self.entries:
             if entry.applies_to(useragent):
                 return entry.allowance(url)
diff --git a/Lib/test/test_robotparser.py b/Lib/test/test_robotparser.py
index 405d517d2e0..04158841077 100644
--- a/Lib/test/test_robotparser.py
+++ b/Lib/test/test_robotparser.py
@@ -202,6 +202,17 @@ bad = ['/folder1/anotherfile.html']
 RobotTest(13, doc, good, bad, agent="googlebot")
 
 
+# 14. For issue #6325 (query string support)
+doc = """
+User-agent: *
+Disallow: /some/path?name=value
+"""
+
+good = ['/some/path']
+bad = ['/some/path?name=value']
+
+RobotTest(14, doc, good, bad)
+
 
 class NetworkTestCase(unittest.TestCase):