diff --git a/changelogs/fragments/postgresql_slot-fix-sslrootcert.yml b/changelogs/fragments/postgresql_slot-fix-sslrootcert.yml
new file mode 100644
index 0000000000..868a7d081f
--- /dev/null
+++ b/changelogs/fragments/postgresql_slot-fix-sslrootcert.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - postgresql_slot - fixed sslrootcert mapping to psycopg2 connection string
diff --git a/lib/ansible/modules/database/postgresql/postgresql_slot.py b/lib/ansible/modules/database/postgresql/postgresql_slot.py
index ec306991c5..de08337731 100644
--- a/lib/ansible/modules/database/postgresql/postgresql_slot.py
+++ b/lib/ansible/modules/database/postgresql/postgresql_slot.py
@@ -340,7 +340,7 @@ def main():
         "login_password": "password",
         "port": "port",
         "sslmode": "ssl_mode",
-        "ca_cert": "ssl_rootcert"
+        "ca_cert": "sslrootcert"
     }
     kw = dict((params_map[k], v) for (k, v) in module.params.items()
               if k in params_map and v != '')