diff --git a/source/dnode/vnode/src/tsdb/tsdbCache.c b/source/dnode/vnode/src/tsdb/tsdbCache.c
index 2e93230a7d..04564f72c2 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCache.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCache.c
@@ -137,7 +137,7 @@ SLastCol *tsdbCacheDeserialize(char const *value) {
   SLastCol *pLastCol = (SLastCol *)value;
   SColVal  *pColVal = &pLastCol->colVal;
   if (IS_VAR_DATA_TYPE(pColVal->type)) {
-    pColVal->value.pData = (char *)value + sizeof(*pColVal);
+    pColVal->value.pData = (char *)value + sizeof(*pLastCol);
   }
 
   return pLastCol;