diff --git a/lib/src/simple_includer.cc b/lib/src/simple_includer.cc
index 91a70cf..5a10b0e 100644
--- a/lib/src/simple_includer.cc
+++ b/lib/src/simple_includer.cc
@@ -58,7 +58,7 @@ namespace hocon {
     }
 
     shared_object simple_includer::include_file_without_fallback(shared_include_context context, std::string what) {
-        return config::parse_file_any_syntax(move(what), context->parse_options())->root();
+        return config::parse_file_any_syntax(move(what), context->parse_options())->resolve(config_resolve_options(true, true))->root();
     }
 
     config_parse_options simple_includer::clear_for_include(config_parse_options const& options) {