diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3b0bd9..c6505c8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,8 @@
 
 ## 2022-08-20
 
-- Treat proxy as non-working if status code >= 400
+- Treat proxy as non-working if status code >= 400.
+- Fix a theoretically possible bug when checking for anonymity.
 
 ## 2022-08-08
 
diff --git a/main.py b/main.py
index 679c57f..0ddcfdd 100755
--- a/main.py
+++ b/main.py
@@ -54,7 +54,10 @@ class Proxy:
         region = data.get("regionName") or "?"
         city = data.get("city") or "?"
         self.geolocation = f"|{country}|{region}|{city}"
-        self.is_anonymous = self.ip != data.get("query")
+
+        query = data.get("query")
+        if query:
+            self.is_anonymous = self.ip != query
 
     def __eq__(self, other: object) -> bool:
         if not isinstance(other, Proxy):