diff --git a/climax/main/preprocess.py b/climax/main/preprocess.py
index 602c6cb1bda7d310a0a44d30e68cc60b78bdb756..526829ad840181a4129890cc0a163500f4e31528 100644
--- a/climax/main/preprocess.py
+++ b/climax/main/preprocess.py
@@ -168,8 +168,8 @@ if __name__ == '__main__':
                 filename = group[0].parent.joinpath(filename)
 
                 # log simulation name, time span and files
-                LOGGER.info('Aggregating simulation: {}, Time span: {}'
-                            .format(sim, '-'.join([y_min, y_max])))
+                LogConfig.init_log('Aggregating simulation: {}, Time span: {}'
+                                   .format(sim, '-'.join([y_min, y_max])))
                 LOGGER.info(('\n ' + (len(__name__) + 1) * ' ').join(
                     ['{}'.format(file) for file in group]))