diff --git a/src/mame/video/phoenix.c b/src/mame/video/phoenix.c
index a4de2a50a8a..9e79354b1b3 100644
--- a/src/mame/video/phoenix.c
+++ b/src/mame/video/phoenix.c
@@ -172,7 +172,9 @@ TILE_GET_INFO_MEMBER(phoenix_state::get_bg_tile_info)
 VIDEO_START_MEMBER(phoenix_state,phoenix)
 {
 	m_videoram_pg[0] = auto_alloc_array(machine(), UINT8, 0x1000);
+	memset(m_videoram_pg[0], 0x00, 0x1000 * sizeof(UINT8));
 	m_videoram_pg[1] = auto_alloc_array(machine(), UINT8, 0x1000);
+	memset(m_videoram_pg[1], 0x00, 0x1000 * sizeof(UINT8));
 
 	membank("bank1")->configure_entry(0, m_videoram_pg[0]);
 	membank("bank1")->configure_entry(1, m_videoram_pg[1]);