diff --git a/src/lsi/mouse.c b/src/lsi/mouse.c
index a502b24..5c3a1be 100644
--- a/src/lsi/mouse.c
+++ b/src/lsi/mouse.c
@@ -52,16 +52,20 @@ int mouse_x, mouse_y, mouse_z;
 
 int mouse_init(void)
 {
-	mouse_fd = open(MOUSEDEVICE, O_RDONLY);
-	if (mouse_fd < 0)
-		err(1, "can't open mouse device");
-
-	vm_register_signal_fd(mouse_fd, VM_MOUSEQ);
-	mouse_initialised = 1;
 	mouse_x = 0;
 	mouse_y = 0;
 	mouse_z = 0;
 
+	mouse_fd = open(MOUSEDEVICE, O_RDONLY);
+	if (mouse_fd < 0) {
+		warn("can't open mouse device");
+		mouse_initialised = 0;
+		return 0;
+	}
+
+	vm_register_signal_fd(mouse_fd, VM_MOUSEQ);
+	mouse_initialised = 1;
+
 	return 1;
 }