Index: applications/editors/josm/plugins/build-common.xml
===================================================================
--- applications/editors/josm/plugins/build-common.xml	(revision 34382)
+++ applications/editors/josm/plugins/build-common.xml	(revision 34383)
@@ -236,5 +236,4 @@
     <target name="javadoc">
         <javadoc destdir="${plugin.doc.dir}"
-                sourcepath="${plugin.src.dir}"
                 encoding="UTF-8"
                 windowtitle="JOSM-${ant.project.name}"
@@ -244,4 +243,9 @@
                 author="false">
             <classpath refid="plugin.classpath"/>
+            <sourcepath>
+                <pathelement path="src" />
+                <pathelement path="gen" />
+                <pathelement path="includes" />
+            </sourcepath>
             <link href="https://docs.oracle.com/javase/8/docs/api"/>
             <link href="https://josm.openstreetmap.de/doc"/>