diff --git a/CMakeLists.txt b/CMakeLists.txt
index c51779d..4d23747 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -173,6 +173,11 @@ add_library(commandline_static
     deps/commandline/src/backends/BufferedBackend.cpp
     deps/commandline/src/backends/BufferedBackend.h
 )
+
+# Ensure the commandline library uses C++11
+set_target_properties(commandline_static PROPERTIES CXX_STANDARD 11 CXX_STANDARD_REQUIRED YES)
+
+
 if (WIN32)
     target_compile_definitions(commandline_static PRIVATE -DPLATFORM_WINDOWS=1)
 else ()
@@ -215,5 +220,4 @@ if(${PROJECT_NAME}_ENABLE_UNIT_TESTING)
     if(MSVC)
         target_link_options(${PROJECT_NAME}-tests PRIVATE "/SUBSYSTEM:CONSOLE")
     endif(MSVC)
-endif()
-
+endif()
\ No newline at end of file
diff --git a/src/TLuaEngine.cpp b/src/TLuaEngine.cpp
index f990ae8..4493158 100644
--- a/src/TLuaEngine.cpp
+++ b/src/TLuaEngine.cpp
@@ -268,7 +268,7 @@ std::vector<std::string> TLuaEngine::StateThreadData::GetStateTableKeys(const st
 
     for (size_t i = 0; i < keys.size(); ++i) {
         auto obj = current.get<sol::object>(keys.at(i));
-        if (obj.get_type() == sol::type::nil) {
+        if (obj.get_type() == sol::type::lua_nil) {
             // error
             break;
         } else if (i == keys.size() - 1) {