diff --git a/lualib-src/lua-sharedata.c b/lualib-src/lua-sharedata.c
index 8e329f9d..d52e294f 100644
--- a/lualib-src/lua-sharedata.c
+++ b/lualib-src/lua-sharedata.c
@@ -306,6 +306,7 @@ convtable(lua_State *L) {
 		for (i=0;i<sizehash;i++) {
 			tbl->hash[i].valuetype = VALUETYPE_NIL;
 			tbl->hash[i].nocolliding = 0;
+			tbl->hash[i].next = -1;
 		}
 		tbl->sizehash = sizehash;