diff --git a/artiq/examples/kasli_sawgmaster/repository/basemod.py b/artiq/examples/kasli_sawgmaster/repository/basemod.py
index 5b996962b..3ca9a1c86 100644
--- a/artiq/examples/kasli_sawgmaster/repository/basemod.py
+++ b/artiq/examples/kasli_sawgmaster/repository/basemod.py
@@ -20,6 +20,6 @@ class BaseMod(EnvExperiment):
             print(basemod.get_mu())
 
         self.core.break_realtime()
-        for rfws in self.rfsws:
-            rfws.on()
+        for rfsw in self.rfsws:
+            rfsw.on()
             delay(1*ms)