diff --git a/src/dbStatic/dbStaticLib.c b/src/dbStatic/dbStaticLib.c
index 8334ef7f6..fa6a1303d 100644
--- a/src/dbStatic/dbStaticLib.c
+++ b/src/dbStatic/dbStaticLib.c
@@ -727,6 +727,7 @@ void epicsShareAPI dbFreeBase(dbBase *pdbbase)
     dbPvdFreeMem(pdbbase);
     dbFreePath(pdbbase);
     free((void *)pdbbase);
+    pdbbase = NULL;
     return;
 }