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-rw-r--r--include/qapi/visitor-impl.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h
index dcd656ab76..8ccb3b6c20 100644
--- a/include/qapi/visitor-impl.h
+++ b/include/qapi/visitor-impl.h
@@ -103,7 +103,8 @@ struct Visitor
                      Error **errp);
 
     /* Must be set to visit explicit null values.  */
-    void (*type_null)(Visitor *v, const char *name, Error **errp);
+    void (*type_null)(Visitor *v, const char *name, QNull **obj,
+                      Error **errp);
 
     /* Must be set for input visitors to visit structs, optional otherwise.
        The core takes care of the return type in the public interface. */