diff --git a/frappy_demo/modules.py b/frappy_demo/modules.py
index b54d20a8..40266a65 100644
--- a/frappy_demo/modules.py
+++ b/frappy_demo/modules.py
@@ -248,6 +248,9 @@ class SampleTemp(Drivable):
         # note: setting self.target to the new value is done after this....
         # note: we may also return the read-back value from the hw here
 
+    def stop(self):
+        self.target = self.value
+
     def _thread(self):
         loopdelay = 1
         while True: