diff --git a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
index 9477ed6eca..4eaf6fd12c 100644
--- a/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
+++ b/src/main/java/com/alibaba/druid/pool/DruidAbstractDataSource.java
@@ -143,7 +143,7 @@ public abstract class DruidAbstractDataSource implements DruidAbstractDataSource
 
     protected boolean                                                                        removeAbandoned;
 
-    protected long                                                                           removeAbandonedTimeoutMillis;
+    protected long                                                                           removeAbandonedTimeoutMillis              = 300 * 1000;
 
     protected boolean                                                                        logAbandoned;