diff --git a/src/main/java/net/openhft/chronicle/map/FileLockUtil.java b/src/main/java/net/openhft/chronicle/map/FileLockUtil.java
index b016515b6..41d23dd82 100644
--- a/src/main/java/net/openhft/chronicle/map/FileLockUtil.java
+++ b/src/main/java/net/openhft/chronicle/map/FileLockUtil.java
@@ -19,7 +19,7 @@ public final class FileLockUtil {
      * Java file locks are maintained on a per JVM basis. So we need to manage them.
      */
     private static final ConcurrentHashMap<File, FileLockReference> FILE_LOCKS = new ConcurrentHashMap<>();
-    private static final boolean USE_LOCKING = !OS.isWindows() && !Boolean.getBoolean("chronicle.map.disable.locking");
+    private static final boolean USE_LOCKING = !OS.isWindows() && !Jvm.getBoolean("chronicle.map.disable.locking");
     private static final AtomicBoolean LOCK_WARNING_PRINTED = new AtomicBoolean();
 
     private FileLockUtil() {