diff --git a/src/libratbag-data.h b/src/libratbag-data.h
index 68445707..ffb4b266 100644
--- a/src/libratbag-data.h
+++ b/src/libratbag-data.h
@@ -80,6 +80,9 @@ ratbag_device_data_hidpp10_get_led_count(const struct ratbag_device_data *data);
 int
 ratbag_device_data_hidpp20_get_index(const struct ratbag_device_data *data);
 
+int
+ratbag_device_data_hidpp20_get_led_count(const struct ratbag_device_data *data);
+
 enum hidpp20_quirk
 ratbag_device_data_hidpp20_get_quirk(const struct ratbag_device_data *data);