diff --git a/CLI/Repl.cpp b/CLI/Repl.cpp
index f57a500..4968d08 100644
--- a/CLI/Repl.cpp
+++ b/CLI/Repl.cpp
@@ -175,7 +175,7 @@ static std::string runCode(lua_State* L, const std::string& source)
         {
             error = "thread yielded unexpectedly";
         }
-        else if (const char* str = lua_tostring(L, -1))
+        else if (const char* str = lua_tostring(T, -1))
         {
             error = str;
         }