diff --git a/extra/guacamole.yml b/extra/guacamole.yml
index 331c16d..5c68e3d 100644
--- a/extra/guacamole.yml
+++ b/extra/guacamole.yml
@@ -30,6 +30,7 @@ services:
     - guacd
     environment:
       GUACD_HOSTNAME: guacd
+      POSTGRES_HOSTNAME: postgres
     env_file:
     - ../.envs/.production/.postgres
     image: guacamole/guacamole