diff --git a/core/src/main/java/com/alibaba/druid/pool/DruidDataSource.java b/core/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
index 3005aee549..69ca361e4e 100644
--- a/core/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
+++ b/core/src/main/java/com/alibaba/druid/pool/DruidDataSource.java
@@ -971,7 +971,7 @@ public void init() throws SQLException {
             if (keepAlive) {
                 // async fill to minIdle
                 if (createScheduler != null) {
-                    for (int i = 0; i < minIdle; ++i) {
+                    for (int i = 0; i < minIdle - initialSize; ++i) {
                         submitCreateTask(true);
                     }
                 } else {