diff --git a/test/test-pointer.c b/test/test-pointer.c
index b5ac1585..2689e4e4 100644
--- a/test/test-pointer.c
+++ b/test/test-pointer.c
@@ -507,6 +507,7 @@ wheel_click_count(struct litest_device *dev, int which)
 		goto out;
 
 	count = parse_mouse_wheel_click_count_property(prop);
+	litest_assert_int_ne(count, 0);
 	angle = 360.0/count;
 
 out: