RDS Aurora PostgreSQL - Error: Permission denied for language C

Hello,

When trying to create a function using C language an error is raised:

ERROR: permission denied for language c.

I'm using RDS Aurora PostgreSQL 12 and my user has the rds_superuser role.

Is it possible to create this? I've been searching and find a workaround (update pg_language table and set lanpltrusted to true) but that only works on EC2.

Thanks in advance.

Regards.