Index: Modules/_tkinter.c
===================================================================
--- Modules/_tkinter.c	(revision 67276)
+++ Modules/_tkinter.c	(working copy)
@@ -1906,7 +1906,7 @@
 PythonCmd(ClientData clientData, Tcl_Interp *interp, int argc, char *argv[])
 {
 	PythonCmd_ClientData *data = (PythonCmd_ClientData *)clientData;
-	PyObject *self, *func, *arg, *res;
+	PyObject *self, *func, *arg, *res, *s;
 	int i, rv;
 	Tcl_Obj *obj_res;
 
@@ -1923,7 +1923,13 @@
 		return PythonCmd_Error(interp);
 
 	for (i = 0; i < (argc - 1); i++) {
-		PyObject *s = PyUnicode_FromString(argv[i + 1]);
+        if (strlen(argv[i + 1]) != Tcl_NumUtfChars(argv[i + 1], -1)) {
+            char *a = argv[i + 1];
+            s = PyUnicode_FromUnicode((Py_UNICODE *)a, strlen(a));
+        }
+        else {
+    		s = PyUnicode_FromString(argv[i + 1]);
+        }
 		if (!s || PyTuple_SetItem(arg, i, s)) {
 			Py_DECREF(arg);
 			return PythonCmd_Error(interp);