diff --git a/dstat_interface/interface/exp_int.py b/dstat_interface/interface/exp_int.py
index 0ca6c18ccbab08e0ae8538fa6af1386b8a61aef0..86e4e94a0b74b10408d30a414a7e6b3892930c96 100644
--- a/dstat_interface/interface/exp_int.py
+++ b/dstat_interface/interface/exp_int.py
@@ -223,6 +223,8 @@ class PD(ExpInterface):
             self.builder.get_object('light_label').set_text(str(
                 dstat_comm.read_light_sensor()))
             dstat_comm.read_settings()
+            dstat_comm.settings['tcs_enabled'][1] = '1' # Make sure TCS enabled
+            dstat_comm.write_settings()
             
             self.builder.get_object('threshold_entry').set_text(str(
                                     dstat_comm.settings['tcs_clear_threshold'][1]))