diff --git a/math-replay/Makefile b/math-replay/Makefile
index 14407cb..ee31d20 100644
--- a/math-replay/Makefile
+++ b/math-replay/Makefile
@@ -1,8 +1,11 @@
 ALL := $(patsubst %.haml,%.html,$(shell find . -name '*.haml'))
+ALL += $(patsubst %.tex,%.pdf,$(shell find . -name '*.tex'))
 
 
 %.html:%.haml
 	haml $^ $@
 
+%.pdf:%.tex
+	texi2pdf $^ -o $@
 
 all: $(ALL)