diff --git a/storage/src/main/java/org/apache/kafka/storage/internals/log/TimeIndex.java b/storage/src/main/java/org/apache/kafka/storage/internals/log/TimeIndex.java
index f221cf4b0e0a..e1ade8c53143 100644
--- a/storage/src/main/java/org/apache/kafka/storage/internals/log/TimeIndex.java
+++ b/storage/src/main/java/org/apache/kafka/storage/internals/log/TimeIndex.java
@@ -66,7 +66,7 @@ public TimeIndex(File file, long baseOffset, int maxIndexSize, boolean writable)
         this.lastEntry = lastEntryFromIndexFile();
 
         log.debug("Loaded index file {} with maxEntries = {}, maxIndexSize = {}, entries = {}, lastOffset = {}, file position = {}",
-            file.getAbsolutePath(), maxEntries(), maxIndexSize, entries(), lastEntry, mmap().position());
+            file.getAbsolutePath(), maxEntries(), maxIndexSize, entries(), lastEntry.offset, mmap().position());
     }
 
     @Override
@@ -278,7 +278,7 @@ private void truncateToEntries(int entries) {
             super.truncateToEntries0(entries);
             this.lastEntry = lastEntryFromIndexFile();
             log.debug("Truncated index {} to {} entries; position is now {} and last entry is now {}",
-                file().getAbsolutePath(), entries, mmap().position(), lastEntry);
+                file().getAbsolutePath(), entries, mmap().position(), lastEntry.offset);
         } finally {
             lock.unlock();
         }
diff --git a/storage/src/main/java/org/apache/kafka/storage/internals/log/TimestampOffset.java b/storage/src/main/java/org/apache/kafka/storage/internals/log/TimestampOffset.java
index 9b48352c2137..9dc35ae32d4b 100644
--- a/storage/src/main/java/org/apache/kafka/storage/internals/log/TimestampOffset.java
+++ b/storage/src/main/java/org/apache/kafka/storage/internals/log/TimestampOffset.java
@@ -67,4 +67,11 @@ public int hashCode() {
         result = 31 * result + Long.hashCode(offset);
         return result;
     }
+
+    @Override
+    public String toString() {
+        return String.format("TimestampOffset(offset = %d, timestamp = %d)",
+            offset,
+            timestamp);
+    }
 }