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-rw-r--r--src/emu/video/mc6845.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/emu/video/mc6845.c b/src/emu/video/mc6845.c
index bc033e5babb..5377e5ee9d1 100644
--- a/src/emu/video/mc6845.c
+++ b/src/emu/video/mc6845.c
@@ -871,7 +871,7 @@ static DEVICE_VALIDITY_CHECK( mc6845 )
int error = FALSE;
const mc6845_interface *intf = (const mc6845_interface *) device->static_config;
- if (intf != NULL)
+ if (intf != NULL && intf->screen_tag != NULL)
{
if (device->clock <= 0)
{