diff --git a/src/pc/lua/smlua_cobject.c b/src/pc/lua/smlua_cobject.c
index 13b034a33..c825a0f33 100644
--- a/src/pc/lua/smlua_cobject.c
+++ b/src/pc/lua/smlua_cobject.c
@@ -430,6 +430,10 @@ static bool smlua_set_field(lua_State* L, u8* p, struct LuaObjectField *data) {
         case LVT_U64: *(s64*)p = smlua_to_integer(L, 3); break;
 
         case LVT_COBJECT_P:
+            if (lua_isnil(L, 3)) {
+                *(u8**)p = NULL;
+                break;
+            }
             valuePointer = smlua_to_cobject(L, 3, data->lot);
             if (gSmLuaConvertSuccess) {
                 *(u8**)p = valuePointer;
@@ -450,6 +454,10 @@ static bool smlua_set_field(lua_State* L, u8* p, struct LuaObjectField *data) {
         case LVT_OBJECTANIMPOINTER_P:
         case LVT_COLLISION_P:
         case LVT_TRAJECTORY_P:
+            if (lua_isnil(L, 3)) {
+                *(u8**)p = NULL;
+                break;
+            }
             valuePointer = smlua_to_cpointer(L, 3, data->valueType);
             if (gSmLuaConvertSuccess) {
                 *(u8**)p = valuePointer;
diff --git a/src/pc/lua/smlua_utils.c b/src/pc/lua/smlua_utils.c
index a7227db89..dfb7ef0fc 100644
--- a/src/pc/lua/smlua_utils.c
+++ b/src/pc/lua/smlua_utils.c
@@ -153,7 +153,7 @@ void* smlua_to_cobject(lua_State* L, int index, u16 lot) {
     if (indexType != LUA_TUSERDATA) {
         LOG_LUA_LINE("smlua_to_cobject received improper type '%s'", lua_typename(L, indexType));
         gSmLuaConvertSuccess = false;
-        return 0;
+        return NULL;
     }
 
     CObject *cobject = luaL_checkudata(L, index, "CObject");
@@ -179,7 +179,7 @@ void* smlua_to_cpointer(lua_State* L, int index, u16 lvt) {
     if (indexType != LUA_TUSERDATA) {
         LOG_LUA_LINE("smlua_to_cpointer received improper type '%s'", lua_typename(L, indexType));
         gSmLuaConvertSuccess = false;
-        return 0;
+        return NULL;
     }
 
     CPointer *cpointer = luaL_checkudata(L, index, "CPointer");