diff --git a/apps/plugins/lua/liolib.c b/apps/plugins/lua/liolib.c
index 2ea52b854b..76c758e363 100644
--- a/apps/plugins/lua/liolib.c
+++ b/apps/plugins/lua/liolib.c
@@ -259,7 +259,7 @@ static int read_number (lua_State *L, int *f) {
   if(i == 0) return 0;
   else {
     rb->lseek(*f, i-10, SEEK_CUR);
-    d = atoi(buf);
+    d = rb->atoi(buf);
     lua_pushnumber(L, d);
     return 1;
   }