diff --git a/Makefile b/Makefile
index c00b79c..261867b 100644
--- a/Makefile
+++ b/Makefile
@@ -18,4 +18,4 @@
 	pandoc -o $@ $^
 
 clean:
-	rm -f *.aux *.tex *.out *.pdf
+	rm -f *.tex userguide.*