diff --git a/include/block/block.h b/include/block/block.h
index ce61883..9661f9a 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -24,6 +24,7 @@
     uint64_t allocated_clusters;
     uint64_t total_clusters;
     uint64_t fragmented_clusters;
+    uint64_t compressed_clusters;
 } BlockFragInfo;
 
 typedef struct QEMUSnapshotInfo {