diff --git a/artiq/examples/remote_exec_controller.py b/artiq/examples/remote_exec_controller.py
index 98b59caea..11e607927 100755
--- a/artiq/examples/remote_exec_controller.py
+++ b/artiq/examples/remote_exec_controller.py
@@ -50,6 +50,9 @@ class CameraSimulation:
             self.noise_level)
         return r
 
+    def ping(self):
+        return True
+
 
 def main():
     logging.basicConfig(level=logging.INFO)