diff --git a/Engine/typesystem_engine.xml b/Engine/typesystem_engine.xml
index b9780309b7..8201088a43 100644
--- a/Engine/typesystem_engine.xml
+++ b/Engine/typesystem_engine.xml
@@ -1497,7 +1497,7 @@
 
 
                     PyObject* subList = PyList_GET_ITEM(%PYARG_1,i);
-                    if (!subList) {
+                    if (!subList || !PyList_Check(subList)) {
                         PyErr_SetString(PyExc_TypeError, "table must be a list of list objects.");
                         return 0;
                     }
@@ -1506,7 +1506,7 @@
 
                     for (int j = 0; j < subSize; ++j) {
                         PyObject* pyString = PyList_GET_ITEM(subList,j);
-                        if ( PyUnicode_Check(pyString) ) {
+                        if ( PyString_Check(pyString) || PyUnicode_Check(pyString) ) {
 
                             PyObject* utf8pyobj = PyUnicode_AsUTF8String(pyString); // newRef
                             if (utf8pyobj) {