diff --git a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
index b632636f14..c82d36c8c4 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
@@ -529,6 +529,8 @@ public abstract class DruidAbstractDataSource extends WrapperAdapter implements
     public void setMaxPoolPreparedStatementPerConnectionSize(int maxPoolPreparedStatementPerConnectionSize) {
         if (maxPoolPreparedStatementPerConnectionSize > 0) {
             this.poolPreparedStatements = true;
+        } else {
+            this.poolPreparedStatements = false;
         }
 
         this.maxPoolPreparedStatementPerConnectionSize = maxPoolPreparedStatementPerConnectionSize;