diff --git a/artiq/examples/master/repository/coredevice_examples/simple/blink_forever.py b/artiq/examples/master/repository/coredevice_examples/simple/blink_forever.py
index b34c74982..83c589ebe 100644
--- a/artiq/examples/master/repository/coredevice_examples/simple/blink_forever.py
+++ b/artiq/examples/master/repository/coredevice_examples/simple/blink_forever.py
@@ -8,7 +8,7 @@ class BlinkForever(EnvExperiment):
 
     @kernel
     def run(self):
-    	self.core.reset()
+        self.core.reset()
         while True:
             self.led.pulse(100*ms)
             delay(100*ms)