diff --git a/src/ioc/dbStatic/dbStaticLib.c b/src/ioc/dbStatic/dbStaticLib.c
index 4cf6d4603..e1af4c720 100644
--- a/src/ioc/dbStatic/dbStaticLib.c
+++ b/src/ioc/dbStatic/dbStaticLib.c
@@ -588,6 +588,7 @@ void dbFreeBase(dbBase *pdbbase)
     dbPvdFreeMem(pdbbase);
     dbFreePath(pdbbase);
     free((void *)pdbbase);
+    pdbbase = NULL;
     return;
 }