diff --git a/src/main/java/net/openhft/chronicle/hash/impl/VanillaChronicleHash.java b/src/main/java/net/openhft/chronicle/hash/impl/VanillaChronicleHash.java
index e1b7736c5..69c0bd221 100644
--- a/src/main/java/net/openhft/chronicle/hash/impl/VanillaChronicleHash.java
+++ b/src/main/java/net/openhft/chronicle/hash/impl/VanillaChronicleHash.java
@@ -543,6 +543,7 @@ public abstract class VanillaChronicleHash<K, KI, MKI extends MetaBytesInterop<K
     }
 
     public long allocateTier(int forSegmentIndex, int tier) {
+        LOG.debug("Allocate tier for segment # {}, tier {}", forSegmentIndex, tier);
         globalMutableStateLock();
         try {
             long tiersInUse = tiersInUse();