diff --git a/make/tex.mk b/make/tex.mk
index e2734cb6..830fdb14 100644
--- a/make/tex.mk
+++ b/make/tex.mk
@@ -251,7 +251,7 @@ $(OUT).html.zip: $(HTMLDIR)
 #$(OUT).ps.zip: $(OUTPUT).ps
 #	zip $@ $<
 
-$(OUTPUT).pdf:
+$(OUTPUT).pdf: $(GENERATED)
 	@echo "-- creating pdf file"
 	pdflatex $(MAIN).tex;  pdflatex $(MAIN).tex;  pdflatex $(MAIN).tex  
 	mv $(MAIN).pdf $(OUTPUT).pdf