diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 5ec5de315e8cd8b84be83e17d4f12dcd7a546e3d..0b76bff3b1a295bc74ef9df94506d6079b084ca7 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -198,7 +198,7 @@ void tscProcessActivityTimer(void *handle, void *tmrId) {
     return;
   }
 
-  void** p = taosCacheAcquireByKey(tscObjCache, &pHB->self, sizeof(TSDB_CACHE_PTR_TYPE));
+  void** p = taosCacheAcquireByKey(tscObjCache, &pHB, sizeof(TSDB_CACHE_PTR_TYPE));
   if (p == NULL) {
     tscWarn("%p HB object has been released already", pHB);
     return;