diff --git a/changelogs/fragments/314-postgresql_info-quote-show-args.yml b/changelogs/fragments/314-postgresql_info-quote-show-args.yml
new file mode 100644
index 000000000..9c1e2635d
--- /dev/null
+++ b/changelogs/fragments/314-postgresql_info-quote-show-args.yml
@@ -0,0 +1,2 @@
+bugfixes:
+- postgresql_info - make arguments passed to SHOW command properly quoted to prevent the interpreter evaluating them (https://github.com/ansible-collections/community.postgresql/issues/314).
diff --git a/plugins/modules/postgresql_info.py b/plugins/modules/postgresql_info.py
index ecfd5d51a..f2c4c1154 100644
--- a/plugins/modules/postgresql_info.py
+++ b/plugins/modules/postgresql_info.py
@@ -1033,7 +1033,7 @@ def get_db_info(self):
 
     def __get_pretty_val(self, setting):
         """Get setting's value represented by SHOW command."""
-        return self.__exec_sql("SHOW %s" % setting)[0][0]
+        return self.__exec_sql('SHOW "%s"' % setting)[0][0]
 
     def __exec_sql(self, query):
         """Execute SQL and return the result."""