all: $(MANUALS)
-html/index.html: $(top_srcdir)/src/*.c $(top_srcdir)/src/*.h $(top_srcdir)/examples/*.c
+html/index.html: $(top_srcdir)/src/*.c $(top_srcdir)/src/*.h $(top_srcdir)/ftdipp/*.cpp $(top_srcdir)/ftdipp/*.hpp $(top_srcdir)/examples/*.c
$(DOXYGEN)