1 files changed, 1 insertions, 1 deletions

diff --git a/src/universe.cpp b/src/universe.cpp
index 0a014f7..d5cc9e2 100644
--- a/src/universe.cpp
+++ b/src/universe.cpp
@@ -56,7 +56,7 @@ Universe* universe_create( lua_State* L)
 void universe_store( lua_State* L, Universe* U)
 {
     STACK_CHECK( L, 0);
-    REGISTRY_SET( L, UNIVERSE_REGKEY, (NULL != U) ? lua_pushlightuserdata( L, U) : lua_pushnil( L));
+    REGISTRY_SET( L, UNIVERSE_REGKEY, (nullptr != U) ? lua_pushlightuserdata( L, U) : lua_pushnil( L));
     STACK_END( L, 0);
 }