diff --git a/hardware/mb_2024_rev_0_0.py b/hardware/mb_2024_rev_0_0.py
index f0d10652e277756d884d907505790e66001ad28c..0786a2aa7aec0b5287027647b7c07b14c2f28b7c 100644
--- a/hardware/mb_2024_rev_0_0.py
+++ b/hardware/mb_2024_rev_0_0.py
@@ -159,7 +159,7 @@ class Tx(TxAbstract):
 
     @polarity.setter
     def polarity(self, value):
-        super().polarity(value)
+        super().polarity = value
         if value==1:
             self.pin0.value = True
             self.pin1.value = False
diff --git a/hardware/ohmpi_card_3_15.py b/hardware/ohmpi_card_3_15.py
index 852189b31a4aa05c484237ac6e1808b407f1c2a2..a1a6a2dee471361c5f34a3061b80bcafce89bcdb 100644
--- a/hardware/ohmpi_card_3_15.py
+++ b/hardware/ohmpi_card_3_15.py
@@ -145,7 +145,7 @@ class Tx(TxAbstract):
 
     @polarity.setter
     def polarity(self, value):
-        super().polarity(value)
+        super().polarity = value
         if value==1:
             self.pin0.value = True
             self.pin1.value = False