diff --git a/webapps/labkey.xml b/webapps/labkey.xml
index 0e0bd74fb8..1ac44b02dd 100644
--- a/webapps/labkey.xml
+++ b/webapps/labkey.xml
@@ -16,6 +16,7 @@
         timeBetweenEvictionRunsMillis="300000"
         minEvictableIdleTimeMillis="300000"
         accessToUnderlyingConnectionAllowed="true"
+        validationQuery="SELECT 1"
         />
 
     <Resource name="mail/Session" auth="Container"