diff --git a/solr/core/src/java/org/apache/solr/core/CoreContainer.java b/solr/core/src/java/org/apache/solr/core/CoreContainer.java
index b910c09a57b..68590ff166d 100644
--- a/solr/core/src/java/org/apache/solr/core/CoreContainer.java
+++ b/solr/core/src/java/org/apache/solr/core/CoreContainer.java
@@ -473,7 +473,7 @@ public class CoreContainer
   
   private volatile boolean isShutDown = false;
 
-  private Config cfg;
+  private volatile Config cfg;
   
   public boolean isShutDown() {
     return isShutDown;