diff --git a/sc2/src/sc2code/comm/starbas/starbas.c b/sc2/src/sc2code/comm/starbas/starbas.c
index 9940ff99b..09d865280 100644
--- a/sc2/src/sc2code/comm/starbas/starbas.c
+++ b/sc2/src/sc2code/comm/starbas/starbas.c
@@ -1983,7 +1983,7 @@ init_starbase_comm ()
 	commander_desc.AlienTextTemplate.valign = VALIGN_MIDDLE;
 
 	// use alternate Starbase track if available
-	commander_desc.AlienAltSong = "comm/starbas/starbas.ogg";
+	commander_desc.AlienAltSong = "comm/starbas/starbas.mod";
 	commander_desc.AlienSongFlags |= LDASF_USE_ALTERNATE;
 
 	CurBulletinMask = 0;
diff --git a/sc2/src/sc2code/comm/utwig/utwigc.c b/sc2/src/sc2code/comm/utwig/utwigc.c
index a77c3a556..2f857e51b 100644
--- a/sc2/src/sc2code/comm/utwig/utwigc.c
+++ b/sc2/src/sc2code/comm/utwig/utwigc.c
@@ -966,7 +966,7 @@ init_utwig_comm (void)
 
 	if (GET_GAME_STATE (UTWIG_HAVE_ULTRON))
 	{	// use alternate 'Happy Utwig!' track
-		utwig_desc.AlienAltSong = "comm/utwig/utwigult.ogg";
+		utwig_desc.AlienAltSong = "comm/utwig/utwigult.mod";
 		utwig_desc.AlienSongFlags |= LDASF_USE_ALTERNATE;
 	}
 	else