diff --git a/mrw/makefile.am b/mrw/makefile.am
index 6caa1f4..b9bb460 100644
--- a/mrw/makefile.am
+++ b/mrw/makefile.am
@@ -386,7 +386,8 @@ $(html_DATA): doxyfile *.[ch]pp $(deps) style.css head.html foot.html
 	test -d $(top_builddir)/doc/html || mkdir -p $(top_builddir)/doc/html
 	@test -f $(top_builddir)/doc/html/hintergrund.png || \
 	  cp $(srcdir)/hintergrund.png \
-	  $(top_builddir)/doc/html
+	  $(top_builddir)/doc/html && \
+	  chmod u+w $(top_builddir)/doc/html/hintergrund.png
 	doxygen doxyfile || \
 	  ( echo "**** ERROR in Doxygen ****" && cat doxygen.errors && false )
 if PEDANTIC