diff --git a/wadsrc/static/filter/game-heretic/sndinfo.txt b/wadsrc/static/filter/game-heretic/sndinfo.txt
index b9f1fd7c3..53017a49a 100644
--- a/wadsrc/static/filter/game-heretic/sndinfo.txt
+++ b/wadsrc/static/filter/game-heretic/sndinfo.txt
@@ -151,6 +151,7 @@ $alias switches/exitbutn	switches/normbutn // Heretic has no special exit button
 plats/pt1_strt			pstart
 plats/pt1_stop			pstop
 plats/pt1_mid			dormov
+plats/pt2_mid			stnmov
 
 //
 // Door Sounds
diff --git a/wadsrc/static/filter/game-heretic/sndseq.txt b/wadsrc/static/filter/game-heretic/sndseq.txt
new file mode 100644
index 000000000..405ebc8fb
--- /dev/null
+++ b/wadsrc/static/filter/game-heretic/sndseq.txt
@@ -0,0 +1,5 @@
+:Platform
+	playuntildone   plats/pt1_strt
+	playrepeat		plats/pt2_mid
+	stopsound		plats/pt1_stop
+end