diff --git a/changelogs/fragments/996-postgresql_privs_fix_function_handling.yml b/changelogs/fragments/996-postgresql_privs_fix_function_handling.yml
new file mode 100644
index 00000000000..b40b253277e
--- /dev/null
+++ b/changelogs/fragments/996-postgresql_privs_fix_function_handling.yml
@@ -0,0 +1,2 @@
+bugfixes:
+- postgresql_privs - fix the module mistakes a procedure for a function (https://github.com/ansible-collections/community.general/issues/994)
diff --git a/lib/ansible/modules/database/postgresql/postgresql_privs.py b/lib/ansible/modules/database/postgresql/postgresql_privs.py
index 96ba006a13a..c6e138cf0f0 100644
--- a/lib/ansible/modules/database/postgresql/postgresql_privs.py
+++ b/lib/ansible/modules/database/postgresql/postgresql_privs.py
@@ -481,6 +481,7 @@ class Connection(object):
 
         self.connection = psycopg2.connect(**kw)
         self.cursor = self.connection.cursor()
+        self.pg_version = self.connection.server_version
 
     def commit(self):
         self.connection.commit()
@@ -528,10 +529,15 @@ class Connection(object):
     def get_all_functions_in_schema(self, schema):
         if not self.schema_exists(schema):
             raise Error('Schema "%s" does not exist.' % schema)
-        query = """SELECT p.proname, oidvectortypes(p.proargtypes)
-                    FROM pg_catalog.pg_proc p
-                    JOIN pg_namespace n ON n.oid = p.pronamespace
-                    WHERE nspname = %s"""
+
+        query = ("SELECT p.proname, oidvectortypes(p.proargtypes) "
+                 "FROM pg_catalog.pg_proc p "
+                 "JOIN pg_namespace n ON n.oid = p.pronamespace "
+                 "WHERE nspname = %s")
+
+        if self.pg_version >= 110000:
+            query += " and p.prokind = 'f'"
+
         self.cursor.execute(query, (schema,))
         return ["%s(%s)" % (t[0], t[1]) for t in self.cursor.fetchall()]
 
@@ -1052,7 +1058,7 @@ def main():
 
     except psycopg2.Error as e:
         conn.rollback()
-        module.fail_json(msg=to_native(e.message))
+        module.fail_json(msg=to_native(e))
 
     if module.check_mode:
         conn.rollback()
diff --git a/test/integration/targets/postgresql/tasks/postgresql_privs.yml b/test/integration/targets/postgresql/tasks/postgresql_privs.yml
index 663ea9aaa41..42aaa66c615 100644
--- a/test/integration/targets/postgresql/tasks/postgresql_privs.yml
+++ b/test/integration/targets/postgresql/tasks/postgresql_privs.yml
@@ -495,6 +495,43 @@
     login_user: "{{ db_user3 }}"
     login_password: password
 
+# Issue https://github.com/ansible-collections/community.general/issues/994
+- name: Create a procedure for tests
+  postgresql_query:
+    query: "CREATE PROCEDURE mock_procedure() LANGUAGE SQL AS $$ SELECT 1; $$;"
+    db: "{{ db_name }}"
+    login_user: "{{ db_user3 }}"
+    login_password: password
+  when: postgres_version_resp.stdout is version('11', '>=')
+
+# Issue https://github.com/ansible-collections/community.general/issues/994
+- name: Try to run module against a procedure, not function
+  postgresql_privs:
+    type: function
+    state: present
+    privs: ALL
+    roles: "{{ db_user2 }}"
+    objs: ALL_IN_SCHEMA
+    schema: public
+    db: "{{ db_name }}"
+    login_user: "{{ db_user3 }}"
+    login_password: password
+  register: result
+  when: postgres_version_resp.stdout is version('11', '>=')
+
+- assert:
+    that:
+    - result is not changed
+  when: postgres_version_resp.stdout is version('11', '>=')
+
+- name: Drop the procedure for tests
+  postgresql_query:
+    query: "DROP PROCEDURE mock_procedure()"
+    db: "{{ db_name }}"
+    login_user: "{{ db_user3 }}"
+    login_password: password
+  when: postgres_version_resp.stdout is version('11', '>=')
+
 #################################################
 # Test ALL_IN_SCHEMA for 'partioned tables type #
 #################################################