diff --git a/phoenix-core/src/it/java/org/apache/phoenix/end2end/ConcurrentMutationsIT.java b/phoenix-core/src/it/java/org/apache/phoenix/end2end/ConcurrentMutationsIT.java
index f18bc11fe1f..d41a1a89dda 100644
--- a/phoenix-core/src/it/java/org/apache/phoenix/end2end/ConcurrentMutationsIT.java
+++ b/phoenix-core/src/it/java/org/apache/phoenix/end2end/ConcurrentMutationsIT.java
@@ -44,7 +44,7 @@ public class ConcurrentMutationsIT extends ParallelStatsDisabledIT {
 
   private static class MyClock extends EnvironmentEdge {
     public volatile long time;
-    boolean shouldAdvance = true;
+    volatile boolean shouldAdvance = true;
 
     public MyClock(long time) {
       this.time = time;