@@ -1377,6 +1377,7 @@ array_fromstring(arrayobject *self, PyObject *args)
 {
     char *str;
     Py_ssize_t n;
+    int copyself;
     int itemsize = self->ob_descr->itemsize;
     if (!PyArg_ParseTuple(args, "s#:fromstring", &str, &n))
         return NULL;
@@ -1392,7 +1393,10 @@ array_fromstring(arrayobject *self, PyObject *args)
             ((Py_SIZE(self) + n) > PY_SSIZE_T_MAX / itemsize)) {
                 return PyErr_NoMemory();
         }
+        copyself = item == str;
         PyMem_RESIZE(item, char, (Py_SIZE(self) + n) * itemsize);
+        if (copyself)
+            str = item;
         if (item == NULL) {
             PyErr_NoMemory();
             return NULL;