diff --git a/ykman-rpc/rpc/device.py b/ykman-rpc/rpc/device.py
index 72fec434..b3dac9f8 100644
--- a/ykman-rpc/rpc/device.py
+++ b/ykman-rpc/rpc/device.py
@@ -101,7 +101,7 @@ class RootNode(RpcNode):
 
     @action(closes_child=False)
     def qr(self, params, event, signal):
-        return dict(result=scan_qr(params["image"]))
+        return dict(result=scan_qr(params.get("image")))
 
 
 class ReadersNode(RpcNode):