src/jdk.jextract/share/classes/com/sun/tools/jextract/JavaSourceFactory.java

*** 259,268 ****
--- 259,269 ----
          String name = headerClassName + "." + intf;
  
          log.print(Level.FINE, () -> "Define class " + name + " for native type " + nativeName);
  
          JavaSourceBuilder jsb = new JavaSourceBuilder(global_jsb.align() + 1);
+         addNativeLocation(false, jsb, structTree.location());
          jsb.addAnnotation(false, NATIVE_STRUCT, Map.of("value", structTree.layout().toString()));
          jsb.interfaceBegin(intf, true, "Struct<" + intf + ">");
          // fields
          structTree.fields().forEach(fieldTree -> addField(jsb, fieldTree, type));
          jsb.interfaceEnd();