diff --git a/libreto/Makefile b/libreto/Makefile
index 5b02934..c2a95f0 100644
--- a/libreto/Makefile
+++ b/libreto/Makefile
@@ -4,7 +4,10 @@ SVGFILES := $(wildcard svg/*.svg)
 
 all: libreto.pdf
 
-pdf/%.pdf: svg/%.svg
+pdf:
+	mkdir pdf
+
+pdf/%.pdf: svg/%.svg pdf
 	 inkscape -C -f $<  -A $@
 
 libreto.pdf: $(SVGFILES:svg/%.svg=pdf/%.pdf)