diff --git a/src/evdev.c b/src/evdev.c
index 0227f515..e0923cd9 100644
--- a/src/evdev.c
+++ b/src/evdev.c
@@ -1813,10 +1813,12 @@ evdev_read_model_flags(struct evdev_device *device)
 	};
 	const struct model_map *m = model_map;
 	uint32_t model_flags = 0;
+	const char *val;
 
 	while (m->property) {
-		if (!!udev_device_get_property_value(device->udev_device,
-						     m->property)) {
+		val = udev_device_get_property_value(device->udev_device,
+						     m->property);
+		if (val && !streq(val, "0")) {
 			log_debug(device->base.seat->libinput,
 				  "%s: tagged as %s\n",
 				  evdev_device_get_sysname(device),