diff --git a/python-sdk/nuscenes/map_expansion/map_api.py b/python-sdk/nuscenes/map_expansion/map_api.py
index 53a14a0c..9857f148 100644
--- a/python-sdk/nuscenes/map_expansion/map_api.py
+++ b/python-sdk/nuscenes/map_expansion/map_api.py
@@ -97,7 +97,7 @@ def __init__(self,
         else:
             self.version = '1.0'
         if self.version < '1.3':
-            raise Exception('Error: You are using an outdated map version (%s)! '
+            raise Exception(f'Error: You are using an outdated map version ({self.version})! '
                             'Please go to https://www.nuscenes.org/download to download the latest map!')
 
         self.canvas_edge = self.json_obj['canvas_edge']