diff --git a/3rd/lua/lstring.c b/3rd/lua/lstring.c
index d21b44f4..2f2214bd 100644
--- a/3rd/lua/lstring.c
+++ b/3rd/lua/lstring.c
@@ -23,7 +23,7 @@
 #include "atomic.h"
 
 static unsigned int STRSEED;
-static size_t STRID = 0;
+static ATOM_SIZET STRID = 0;
 
 /*
 ** Maximum size for string table.