diff --git a/src/util/lua.h b/src/util/lua.h
index e4cf92289..32d950a73 100644
--- a/src/util/lua.h
+++ b/src/util/lua.h
@@ -136,6 +136,7 @@ inline int pushboolean(lua_State * L, bool b) { lua_pushboolean(L, b); return 1;
 inline int pushstring(lua_State * L, char const * s) { lua_pushstring(L, s); return 1; }
 inline int pushinteger(lua_State * L, lua_Integer v) { lua_pushinteger(L, v); return 1; }
 inline int pushnumber(lua_State * L, lua_Number v) { lua_pushnumber(L, v); return 1; }
+inline int pushnil(lua_State * L) { lua_pushnil(L); return 1; }
 // =======================================
 
 }