diff --git a/2013/endoh3/try.sh b/2013/endoh3/try.sh
index 39586e6b2..7fe5cb64a 100755
--- a/2013/endoh3/try.sh
+++ b/2013/endoh3/try.sh
@@ -76,6 +76,7 @@ endoh3()
 	    echo 1>&2
 	else
 	    echo "Please install either SoX, ruby or padsp (from PulseAudio)." 1>&2
+	    echo "Tip: see https://github.com/ioccc-src/temp-test-ioccc/blob/master/faq.md#sox." 1>&2
 	    exit 1
 	fi
     fi