diff --git a/doc/Makefile.am b/doc/Makefile.am
index 0c1960b..22dec5a 100644
--- a/doc/Makefile.am
+++ b/doc/Makefile.am
@@ -40,7 +40,7 @@
 # us to have a generic automatic .pdf rule to build the figure sources
 # because it cant just work from the png's directly it seems - contrary
 # to the documentation...
-quagga.pdf: $(srcdir)/quagga.texi $(figures_pdf)
+quagga.pdf: $(info_TEXINFOS) $(figures_pdf)
 	$(TEXI2PDF) -o "$@" $<
 
 quagga_TEXINFOS = appendix.texi basic.texi bgpd.texi filter.texi install.texi \