diff --git a/src/main/java/com/alibaba/druid/pool/PoolablePreparedStatement.java b/src/main/java/com/alibaba/druid/pool/PoolablePreparedStatement.java
index 9926e429c0..385296fab0 100644
--- a/src/main/java/com/alibaba/druid/pool/PoolablePreparedStatement.java
+++ b/src/main/java/com/alibaba/druid/pool/PoolablePreparedStatement.java
@@ -692,7 +692,7 @@ public class PoolablePreparedStatement extends PoolableStatement implements Prep
         }
     }
 
-    static class PreparedStatementKey {
+    public static class PreparedStatementKey {
 
         protected final String     sql;
         protected final String     catalog;