diff --git a/script/device/Mythen.py b/script/device/Mythen.py
index 7d565a3..fae1dc8 100644
--- a/script/device/Mythen.py
+++ b/script/device/Mythen.py
@@ -65,7 +65,7 @@ class Mythen(DeviceBase, Readable):
         self.read()
         self.is_acquiring()
 
-    def abort():
+    def abort(self):
         while (mythen.is_acquiring()):
           mythen.stop()
           time.sleep(0.25)