diff --git a/hardware/ecp5_mainboard/mainboard_prod/readme-royalcircuit.txt b/hardware/ecp5_mainboard/mainboard_prod/readme-royalcircuit.txt
index b030822..8314be5 100644
--- a/hardware/ecp5_mainboard/mainboard_prod/readme-royalcircuit.txt
+++ b/hardware/ecp5_mainboard/mainboard_prod/readme-royalcircuit.txt
@@ -36,3 +36,4 @@ PCB specification:
  - Hard gold fingers with 30 degree bevelling for card edge connector
  - Matte black soldermask (black if matte unavailable)
  - White silkscreen
+ - RoHS: Yes