diff --git a/src/mame/video/cidelsa.c b/src/mame/video/cidelsa.c
index 46fb401396e..592b894ae13 100644
--- a/src/mame/video/cidelsa.c
+++ b/src/mame/video/cidelsa.c
@@ -163,10 +163,8 @@ static CDP1869_INTERFACE( draco_vis_intf )
 void cidelsa_state::video_start()
 {
 	// allocate memory
-	m_pcbram = auto_alloc_array(machine(), UINT8, CIDELSA_CHARRAM_SIZE);
-	memset(m_pcbram, 0x00, CIDELSA_CHARRAM_SIZE * sizeof(UINT8));
-	m_charram = auto_alloc_array(machine(), UINT8, CIDELSA_CHARRAM_SIZE);
-	memset(m_charram, 0x00, CIDELSA_CHARRAM_SIZE * sizeof(UINT8));
+	m_pcbram = auto_alloc_array_clear(machine(), UINT8, CIDELSA_CHARRAM_SIZE);
+	m_charram = auto_alloc_array_clear(machine(), UINT8, CIDELSA_CHARRAM_SIZE);
 
 	// register for state saving
 	save_item(NAME(m_cdp1869_pcb));