diff --git a/qcodes/instrument_drivers/Keysight/keysightb1500/KeysightB1500_module.py b/qcodes/instrument_drivers/Keysight/keysightb1500/KeysightB1500_module.py
index 48583c34435..47e81dc0260 100644
--- a/qcodes/instrument_drivers/Keysight/keysightb1500/KeysightB1500_module.py
+++ b/qcodes/instrument_drivers/Keysight/keysightb1500/KeysightB1500_module.py
@@ -249,6 +249,6 @@ def is_enabled(self) -> bool:
         activated_channels = re.sub(r"[^,\d]", "", response).split(",")
 
         is_enabled = set(self.channels).issubset(
-            int(x) for x in activated_channels if x is not ''
+            int(x) for x in activated_channels if x != ''
         )
         return is_enabled