diff --git a/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java b/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
index 320aaacd10..916fb89d73 100644
--- a/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
+++ b/src/main/java/com/alibaba/druid/pool/vendor/MySqlValidConnectionChecker.java
@@ -74,7 +74,9 @@ public class MySqlValidConnectionChecker implements ValidConnectionChecker, Seri
         ResultSet rs = null;
         try {
             stmt = conn.createStatement();
-            stmt.setQueryTimeout(validationQueryTimeout);
+            if (validationQueryTimeout > 0) {
+                stmt.setQueryTimeout(validationQueryTimeout);
+            }
             rs = stmt.executeQuery(valiateQuery);
             return true;
         } catch (SQLException e) {