diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
index dcb66cf..f730915 100644
--- a/Modules/arraymodule.c
+++ b/Modules/arraymodule.c
@@ -447,10 +447,7 @@
 	register arrayobject *ap;
 	assert(array_Check(op));
 	ap = (arrayobject *)op;
-	if (i < 0 || i >= ap->ob_size) {
-		PyErr_SetString(PyExc_IndexError, "array index out of range");
-		return NULL;
-	}
+	assert(i>=0 && i<ap->ob_size);
 	return (*ap->ob_descr->getitem)(ap, i);
 }