diff --git a/news/402.misc.md b/news/402.misc.md
new file mode 100644
index 00000000..f4d5d9d2
--- /dev/null
+++ b/news/402.misc.md
@@ -0,0 +1 @@
+Fix one additional encoding warning
diff --git a/src/cleo/io/outputs/stream_output.py b/src/cleo/io/outputs/stream_output.py
index 39bdd65f..200fff38 100644
--- a/src/cleo/io/outputs/stream_output.py
+++ b/src/cleo/io/outputs/stream_output.py
@@ -50,7 +50,12 @@ def _get_utf8_support_info(self) -> bool:
         """
         Returns whether the stream supports the UTF-8 encoding.
         """
-        encoding = self._stream.encoding or locale.getpreferredencoding(False)
+        if self._stream.encoding:
+            encoding = self._stream.encoding
+        elif sys.version_info < (3, 11):
+            encoding = locale.getpreferredencoding(False)
+        else:
+            encoding = locale.getencoding()
 
         try:
             return codecs.lookup(encoding).name == "utf-8"