diff --git a/builtin-run.c b/builtin-run.c
index 03b119e..c23e7a2 100644
--- a/builtin-run.c
+++ b/builtin-run.c
@@ -543,6 +543,11 @@
 		kvm->cfg.console = DEFAULT_CONSOLE;
 
 	video = kvm->cfg.vnc || kvm->cfg.sdl || kvm->cfg.gtk;
+	if (video) {
+		if ((kvm->cfg.vnc && (kvm->cfg.sdl || kvm->cfg.gtk)) ||
+		    (kvm->cfg.sdl && kvm->cfg.gtk))
+			die("Only one of --vnc, --sdl or --gtk can be specified");
+	}
 
 	if (!strncmp(kvm->cfg.console, "virtio", 6))
 		kvm->cfg.active_console  = CONSOLE_VIRTIO;
diff --git a/hw/vesa.c b/hw/vesa.c
index dd59a11..a4ec7e1 100644
--- a/hw/vesa.c
+++ b/hw/vesa.c
@@ -61,8 +61,6 @@
 	BUILD_BUG_ON(!is_power_of_two(VESA_MEM_SIZE));
 	BUILD_BUG_ON(VESA_MEM_SIZE < VESA_BPP/8 * VESA_WIDTH * VESA_HEIGHT);
 
-	if (!kvm->cfg.vnc && !kvm->cfg.sdl && !kvm->cfg.gtk)
-		return NULL;
 	vesa_base_addr = pci_get_io_port_block(PCI_IO_SIZE);
 	r = ioport__register(kvm, vesa_base_addr, &vesa_io_ops, PCI_IO_SIZE, NULL);
 	if (r < 0)