diff --git a/README.md b/README.md
index 914e0223..8c4d322a 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ The following metrics are exposed currently.
 - oracledb_wait_time_user_io
 - oracledb_tablespace_bytes
 - oracledb_tablespace_max_bytes
-- oracledb_tablespace_bytes_free
+- oracledb_tablespace_free
 - oracledb_process_count
 - oracledb_resource_current_utilization
 - oracledb_resource_limit_value