Index: Modules/_pickle.c
===================================================================
--- Modules/_pickle.c	(revision 82259)
+++ Modules/_pickle.c	(working copy)
@@ -3547,7 +3547,7 @@
         if (len < 2)
             return bad_readline();
         class_name = PyUnicode_DecodeASCII(s, len - 1, "strict");
-        if (class_name == NULL) {
+        if (class_name != NULL) {
             cls = find_class(self, module_name, class_name);
             Py_DECREF(class_name);
         }