diff --git a/nutzboot-starter/nutzboot-starter-jdbc/src/main/java/org/nutz/boot/starter/jdbc/DataSourceStarter.java b/nutzboot-starter/nutzboot-starter-jdbc/src/main/java/org/nutz/boot/starter/jdbc/DataSourceStarter.java
index 50141d005dd5e76e2d3ac71108ac0a122f634439..6f883ff4fca2141d788d19e37ae7b80438fe843f 100644
--- a/nutzboot-starter/nutzboot-starter-jdbc/src/main/java/org/nutz/boot/starter/jdbc/DataSourceStarter.java
+++ b/nutzboot-starter/nutzboot-starter-jdbc/src/main/java/org/nutz/boot/starter/jdbc/DataSourceStarter.java
@@ -163,7 +163,7 @@ public class DataSourceStarter {
                 if (!conf.has(prefix + "jdbcUrl"))
                     properties.put("jdbcUrl", conf.get(key));
             } else {
-                properties.put(key.substring(5), conf.get(key));
+                properties.put(key.substring(prefix.length()), conf.get(key));
             }
         }
         return new HikariDataSource(new HikariConfig(properties));