diff --git a/builtin/providers/postgresql/config.go b/builtin/providers/postgresql/config.go
index 125c2d79cd..61b7f4cd5d 100644
--- a/builtin/providers/postgresql/config.go
+++ b/builtin/providers/postgresql/config.go
@@ -70,7 +70,7 @@ func (c *Config) NewClient() (*Client, error) {
 func (c *Client) Connect() (*sql.DB, error) {
 	db, err := sql.Open("postgres", c.connStr)
 	if err != nil {
-		return nil, fmt.Errorf("Error connecting to PostgreSQL server: %s", err)
+		return nil, fmt.Errorf("Error connecting to PostgreSQL server: %v", err)
 	}
 
 	return db, nil