diff --git a/tools/example/net/poettering/Calculator.interface.yaml b/tools/example/net/poettering/Calculator.interface.yaml
index 4167c36..3c70cbc 100644
--- a/tools/example/net/poettering/Calculator.interface.yaml
+++ b/tools/example/net/poettering/Calculator.interface.yaml
@@ -40,7 +40,7 @@
           description: >
             The result of (x/y).
       errors:
-        - self.DivisionByZero
+        - self.Error.DivisionByZero
     - name: Clear
       description: >
         Reset the LastResult property to zero.