1 files changed, 1 insertions, 1 deletions
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 3b307ed..1522a16 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -10672,7 +10672,7 @@ PyUnicode_Append(PyObject **p_left, PyObject *right)
         return;
     }
     left = *p_left;
-    if (right == NULL || !PyUnicode_Check(left)) {
+    if (right == NULL || left == NULL || !PyUnicode_Check(left)) {
         if (!PyErr_Occurred())
             PyErr_BadInternalCall();
         goto error;