diff --git a/harbour/source/rtl/persist.prg b/harbour/source/rtl/persist.prg
index 1ed32e4e69..9543698413 100644
--- a/harbour/source/rtl/persist.prg
+++ b/harbour/source/rtl/persist.prg
@@ -53,6 +53,8 @@
 #include "hbclass.ch"
 #include "common.ch"
 
+extern HB_STOD
+
 CLASS HBPersistent
 
    METHOD CreateNew() INLINE Self