diff --git a/smithy-diff/src/main/java/software/amazon/smithy/diff/evaluators/AddedOperationError.java b/smithy-diff/src/main/java/software/amazon/smithy/diff/evaluators/AddedOperationError.java
index f667545d7be..bbf612801ef 100644
--- a/smithy-diff/src/main/java/software/amazon/smithy/diff/evaluators/AddedOperationError.java
+++ b/smithy-diff/src/main/java/software/amazon/smithy/diff/evaluators/AddedOperationError.java
@@ -50,7 +50,7 @@ private List<ValidationEvent> createErrorViolations(ChangedShape<OperationShape>
                         + "encountered as a result of a change in behavior of "
                         + "the client (for example, the client sends a new "
                         + "parameter to an operation).",
-                        change.getShapeId(), id)));
+                        id, change.getShapeId())));
             }
         }