diff --git a/Python/ceval.c b/Python/ceval.c
index 3ca972a..a5d465c 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -919,10 +919,12 @@
 #define SECOND()	(stack_pointer[-2])
 #define THIRD() 	(stack_pointer[-3])
 #define FOURTH()	(stack_pointer[-4])
+#define PEEK(n)         (stack_pointer[-(n)])
 #define SET_TOP(v)	(stack_pointer[-1] = (v))
 #define SET_SECOND(v)	(stack_pointer[-2] = (v))
 #define SET_THIRD(v)	(stack_pointer[-3] = (v))
 #define SET_FOURTH(v)	(stack_pointer[-4] = (v))
+#define SET_VALUE(n, v) (stack_pointer[-(n)] = (v))
 #define BASIC_STACKADJ(n)	(stack_pointer += n)
 #define BASIC_PUSH(v)	(*stack_pointer++ = (v))
 #define BASIC_POP()	(*--stack_pointer)
@@ -1548,7 +1550,7 @@
 
 		TARGET(LIST_APPEND)
 			w = POP();
-			v = stack_pointer[-oparg];
+			v = PEEK(oparg);
 			err = PyList_Append(v, w);
 			Py_DECREF(w);
 			if (err == 0) {
@@ -1909,7 +1911,7 @@
 				}
 			} else if (unpack_iterable(v, oparg, -1,
 						   stack_pointer + oparg)) {
-				stack_pointer += oparg;
+				STACKADJ(oparg);
 			} else {
 				/* unpack_iterable() raised an exception */
 				why = WHY_EXCEPTION;