diff --git a/dstat_interface/interface/exp_int.py b/dstat_interface/interface/exp_int.py
index 1cb9a345d2fc8befd21fb33f289f055c12556e77..4c477a787efa0b9916c89cf29082ba998748f557 100755
--- a/dstat_interface/interface/exp_int.py
+++ b/dstat_interface/interface/exp_int.py
@@ -441,7 +441,7 @@ class CAL(ExpInterface):
             __main__.MAIN.stop_ocp()
             __main__.MAIN.spinner.start()
             
-            offset = dstat_comm.measure_offset(self.get_params()['time'])
+            offset = dstat_comm.measure_offset(self.params['time'])
             
             for i in offset:
                 _logger.error(" ".join((i, str(-offset[i]))), "INFO")