diff --git a/math-replay/Makefile b/math-replay/Makefile
index ee31d20..918cb2d 100644
--- a/math-replay/Makefile
+++ b/math-replay/Makefile
@@ -6,6 +6,8 @@ ALL += $(patsubst %.tex,%.pdf,$(shell find . -name '*.tex'))
 	haml $^ $@
 
 %.pdf:%.tex
-	texi2pdf $^ -o $@
+	texi2pdf $^ -o $@ && \
+		rm -vf $(patsubst %.pdf,%.aux,$(notdir $@)) \
+		       $(patsubst %.pdf,%.log,$(notdir $@))
 
 all: $(ALL)