diff --git a/docs/src/ecc_example_sim.md b/docs/src/ecc_example_sim.md
index 5feef8edf..e20f66703 100644
--- a/docs/src/ecc_example_sim.md
+++ b/docs/src/ecc_example_sim.md
@@ -26,7 +26,7 @@ ecirc = encoding_circuit(code)
 
 ... and the corresponding syndrome measurement circuit (the non-fault tolerant one)
 ```@example 1
-scirc = naive_syndrome_circuit(code)
+scirc, _ = naive_syndrome_circuit(code)
 ```
 
 The most straightforward way to start sampling syndromes is to set up a table of Pauli frames.