diff --git a/doc/history.d b/doc/history.d
index 5b6e2c7ef..9cad62d98 100644
--- a/doc/history.d
+++ b/doc/history.d
@@ -3,6 +3,7 @@ Name
 
 AdvanceMAME/MESS Version 3.3 2017/02
 	) Fixed handling of input_map[] definitions [Vincent Hamon].
+	) Fixed crashes in games xmen6p and xmen6pu.
 
 AdvanceMAME/MESS Version 3.2 2017/01
 	) Fixed a terminating hanging condition when dealing with the
diff --git a/src/sound/k054539.c b/src/sound/k054539.c
index da750bf99..266ba0b71 100644
--- a/src/sound/k054539.c
+++ b/src/sound/k054539.c
@@ -456,10 +456,10 @@ static void K054539_init_chip(struct k054539_info *info, int sndindex)
 	info->K054539_flags |= K054539_UPDATE_AT_KEYON; //* make it default until proven otherwise
 
 	// Real size of 0x4000, the addon is to simplify the reverb buffer computations
-	info->ram = auto_malloc(0x4000*2+48000/55*2);
+	info->ram = auto_malloc(0x4000*2+48000/55*2+0x4000);
 	info->reverb_pos = 0;
 	info->cur_ptr = 0;
-	memset(info->ram, 0, 0x4000*2+48000/55*2);
+	memset(info->ram, 0, 0x4000*2+48000/55*2+0x4000);
 
 	info->rom = memory_region(info->intf->region);
 	info->rom_size = memory_region_length(info->intf->region);