diff --git a/postgresql/helpers.go b/postgresql/helpers.go
index a11103d2..e2281398 100644
--- a/postgresql/helpers.go
+++ b/postgresql/helpers.go
@@ -491,12 +491,12 @@ func isSuperuser(db QueryAble, role string) (bool, error) {
 
 const publicRole = "public"
 
-func getRoleOID(db QueryAble, role string) (int, error) {
+func getRoleOID(db QueryAble, role string) (uint32, error) {
 	if role == publicRole {
 		return 0, nil
 	}
 
-	var oid int
+	var oid uint32
 	if err := db.QueryRow("SELECT oid FROM pg_roles WHERE rolname = $1", role).Scan(&oid); err != nil {
 		return 0, fmt.Errorf("could not find oid for role %s: %w", role, err)
 	}
diff --git a/postgresql/resource_postgresql_grant.go b/postgresql/resource_postgresql_grant.go
index e6cc5315..8e0b315f 100644
--- a/postgresql/resource_postgresql_grant.go
+++ b/postgresql/resource_postgresql_grant.go
@@ -255,7 +255,7 @@ func resourcePostgreSQLGrantDelete(db *DBConnection, d *schema.ResourceData) err
 	return nil
 }
 
-func readDatabaseRolePriviges(txn *sql.Tx, d *schema.ResourceData, roleOID int) error {
+func readDatabaseRolePriviges(txn *sql.Tx, d *schema.ResourceData, roleOID uint32) error {
 	dbName := d.Get("database").(string)
 	query := `
 SELECT array_agg(privilege_type)
@@ -274,7 +274,7 @@ WHERE grantee = $2
 	return nil
 }
 
-func readSchemaRolePriviges(txn *sql.Tx, d *schema.ResourceData, roleOID int) error {
+func readSchemaRolePriviges(txn *sql.Tx, d *schema.ResourceData, roleOID uint32) error {
 	dbName := d.Get("schema").(string)
 	query := `
 SELECT array_agg(privilege_type)
@@ -293,7 +293,7 @@ WHERE grantee = $2
 	return nil
 }
 
-func readForeignDataWrapperRolePrivileges(txn *sql.Tx, d *schema.ResourceData, roleOID int) error {
+func readForeignDataWrapperRolePrivileges(txn *sql.Tx, d *schema.ResourceData, roleOID uint32) error {
 	objects := d.Get("objects").(*schema.Set).List()
 	fdwName := objects[0].(string)
 	query := `
@@ -313,7 +313,7 @@ WHERE grantee = $2
 	return nil
 }
 
-func readForeignServerRolePrivileges(txn *sql.Tx, d *schema.ResourceData, roleOID int) error {
+func readForeignServerRolePrivileges(txn *sql.Tx, d *schema.ResourceData, roleOID uint32) error {
 	objects := d.Get("objects").(*schema.Set).List()
 	srvName := objects[0].(string)
 	query := `