diff --git a/compose/docker-compose-fixturenet-optimism.yml b/compose/docker-compose-fixturenet-optimism.yml
index 460b9db..cb2fcde 100644
--- a/compose/docker-compose-fixturenet-optimism.yml
+++ b/compose/docker-compose-fixturenet-optimism.yml
@@ -91,6 +91,7 @@ services:
     environment:
       CERC_SCRIPT_DEBUG: ${CERC_SCRIPT_DEBUG}
       CERC_L1_RPC: ${CERC_L1_RPC}
+      CERC_L1_BEACON: ${CERC_L1_BEACON}
     volumes:
       - ../config/fixturenet-optimism/run-op-node.sh:/run-op-node.sh
       - l1_deployment:/l1-deployment:ro