diff --git a/software/HaasoscopeQt.py b/software/HaasoscopeQt.py
index 980c4b6c..3c523567 100755
--- a/software/HaasoscopeQt.py
+++ b/software/HaasoscopeQt.py
@@ -443,6 +443,8 @@ def triggerposchanged(self,value):
     def rolling(self):
         d.rolltrigger = not d.rolltrigger
         d.tellrolltrig(d.rolltrigger)
+        if trigboardport!="":
+            trigboard.togglerolling()
         self.ui.rollingButton.setChecked(d.rolltrigger)
         if d.rolltrigger: self.ui.rollingButton.setText("Rolling/Auto")
         else: self.ui.rollingButton.setText("Normal")
diff --git a/software/HaasoscopeTrigLibQt.py b/software/HaasoscopeTrigLibQt.py
index d5a2dc54..f97183f7 100755
--- a/software/HaasoscopeTrigLibQt.py
+++ b/software/HaasoscopeTrigLibQt.py
@@ -10,6 +10,12 @@ def construct(self,port):
         self.ser=Serial(port,115200,timeout=0.2)
         self.extclock=0
         self.histostosend=-1
+        self.dorolling=1
+    
+    def togglerolling(self):
+        self.dorolling = not self.dorolling
+        self.ser.write(bytearray([13]))  # toggle rolling
+        print("trigboard rolling is now",self.dorolling)
 
     def setclock(self, wantactiveclock): # True for wanting sync with external clock
         self.extclock = 0
@@ -91,4 +97,6 @@ def get_histos(self):
 
     def cleanup(self):
         self.setclock(False)
+        if not self.dorolling: self.togglerolling()
         self.ser.close()
+