diff --git a/Makefile b/Makefile
index 4f32196..2e19ab0 100644
--- a/Makefile
+++ b/Makefile
@@ -4,6 +4,9 @@
 
 default: cptt.pdf cptt.dvi
 
+pdf: cptt.pdf
+dvi: cptt.dvi
+
 %.pdf: %.tex
 	pdflatex $<
 	pdflatex $<