diff --git a/CHANGELOG.md b/CHANGELOG.md
index ed22e937..e0b7d80e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 - accessing a multikey may lead to IndexError [#359](https://github.com/Draegerwerk/sdc11073/issues/359)
+- fixed a bug where `log_prefix` can only be a string [#393](https://github.com/Draegerwerk/sdc11073/issues/393)
 
 ## [1.3.2] - 2024-03-18
 
diff --git a/src/sdc11073/loghelper.py b/src/sdc11073/loghelper.py
index 3e38bcf4..ceb9bbba 100644
--- a/src/sdc11073/loghelper.py
+++ b/src/sdc11073/loghelper.py
@@ -60,7 +60,7 @@ def __init__(self, logger, prefix=None):
 
     def _process(self, msg, args, kwargs):
         try:
-            _msg = self.log_prefix + msg
+            _msg = f'{self.log_prefix}{msg}'
         except TypeError:
             _msg = msg
 
diff --git a/tests/test_loghelper.py b/tests/test_loghelper.py
index ef04e7b9..f4248a3c 100644
--- a/tests/test_loghelper.py
+++ b/tests/test_loghelper.py
@@ -1,5 +1,8 @@
 import unittest
 import logging
+import uuid
+from unittest import mock
+
 from sdc11073 import loghelper
 
 
@@ -45,3 +48,15 @@ def test_logwatcher(self):
         records = lw2.getAllRecords()
         self.assertEqual(len(records), 1)
         self.assertRaises(loghelper.LogWatchException, lw2.check)
+
+    def test_ident_parameter(self):
+        def _test_prefix(prefix):
+            adapter = loghelper.LoggerAdapter(logger=mock.MagicMock(), prefix=prefix)
+            msg = uuid.uuid4()
+            processed_msg = adapter._process(msg, (), ())
+            self.assertEqual(f'{prefix or ""}{msg}', processed_msg)
+
+        _test_prefix(1)
+        _test_prefix('1')
+        _test_prefix(mock.MagicMock())
+        _test_prefix(None)