Index: Python/ceval.c
===================================================================
--- Python/ceval.c	(revision 68762)
+++ Python/ceval.c	(working copy)
@@ -1775,8 +1775,8 @@
 		PREDICTED_WITH_ARG(UNPACK_SEQUENCE);
 		case UNPACK_SEQUENCE:
 			v = POP();
-			if (PyTuple_CheckExact(v) &&
-			    PyTuple_GET_SIZE(v) == oparg) {
+			if (likely(PyTuple_CheckExact(v) &&
+			    PyTuple_GET_SIZE(v) == oparg)) {
 				PyObject **items = \
 					((PyTupleObject *)v)->ob_item;
 				while (oparg--) {