diff --git a/src/tsdb/inc/tsdbMain.h b/src/tsdb/inc/tsdbMain.h
index 39808ab02fd23373a14aae8027604cf4f37b026d..22d069141654b129f366c6b5dfc5c1a32373dc46 100644
--- a/src/tsdb/inc/tsdbMain.h
+++ b/src/tsdb/inc/tsdbMain.h
@@ -261,11 +261,12 @@ SFileGroup *tsdbGetFileGroupNext(SFileGroupIter *pIter);
 typedef struct {
   int32_t len;
   int32_t offset;
+  int32_t padding; // For padding purpose
   int32_t hasLast : 1;
   int32_t numOfBlocks : 31;
-  int32_t checksum;
+  int64_t uid;
   TSKEY   maxKey;
-} SCompIdx; /* sizeof(SCompIdx) = 24 */
+} SCompIdx; /* sizeof(SCompIdx) = 28 */
 
 /**
  * if numOfSubBlocks == 0, then the SCompBlock is a sub-block
diff --git a/src/tsdb/src/tsdbRWHelper.c b/src/tsdb/src/tsdbRWHelper.c
index 653379e03b1154cf95fab271286996f68fce170d..e32a64629678a4d16a54885ccb9184a09a50a15a 100644
--- a/src/tsdb/src/tsdbRWHelper.c
+++ b/src/tsdb/src/tsdbRWHelper.c
@@ -414,6 +414,7 @@ int tsdbWriteCompInfo(SRWHelper *pHelper) {
     ASSERT((pIdx->len - sizeof(SCompInfo) - sizeof(TSCKSUM)) % sizeof(SCompBlock) == 0);
     taosCalcChecksumAppend(0, (uint8_t *)pHelper->pCompInfo, pIdx->len);
     pIdx->offset = lseek(pHelper->files.nHeadF.fd, 0, SEEK_END);
+    pIdx->uid = pHelper->tableInfo.uid;
     if (pIdx->offset < 0) return -1;
     ASSERT(pIdx->offset >= tsizeof(pHelper->pCompIdx));