diff --git a/pyzabbix/__init__.py b/pyzabbix/__init__.py
index 164708c..1051149 100644
--- a/pyzabbix/__init__.py
+++ b/pyzabbix/__init__.py
@@ -126,7 +126,7 @@ def do_request(self, method, params=None):
         if 'error' in response_json:  # some exception
             if 'data' not in response_json['error']: # some errors don't contain 'data': workaround for ZBX-9340
                 response_json['error']['data'] = "No data"
-            msg = u"Error {code}: {message}, {data}".format(
+            msg = "Error {code}: {message}, {data}".format(
                 code=response_json['error']['code'],
                 message=response_json['error']['message'],
                 data=response_json['error']['data']