diff --git a/dev/core/src/com/google/gwt/dev/jjs/impl/GwtAstBuilder.java b/dev/core/src/com/google/gwt/dev/jjs/impl/GwtAstBuilder.java
index 266a53a..688db65 100644
--- a/dev/core/src/com/google/gwt/dev/jjs/impl/GwtAstBuilder.java
+++ b/dev/core/src/com/google/gwt/dev/jjs/impl/GwtAstBuilder.java
@@ -3172,7 +3172,8 @@
     }
 
     private boolean isDoNotAutoBoxParameter(MethodBinding methodBinding, int parameterIndex) {
-      AnnotationBinding[][] parameterAnnotations = methodBinding.getParameterAnnotations();
+      AnnotationBinding[][] parameterAnnotations =
+          methodBinding.original().getParameterAnnotations();
       return parameterAnnotations != null
           && parameterAnnotations.length > parameterIndex
           && parameterAnnotations[parameterIndex] != null