Keep Microsoft VC happy.
diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
index 5862f6c..e732f39 100644
--- a/Modules/arraymodule.c
+++ b/Modules/arraymodule.c
@@ -341,7 +341,7 @@
 	}
 	nbytes = size * descr->itemsize;
 	/* Check for overflow */
-	if (nbytes / descr->itemsize != size) {
+	if (nbytes / descr->itemsize != (size_t)size) {
 		return PyErr_NoMemory();
 	}
 	op = PyMem_NEW(arrayobject, 1);
@@ -933,7 +933,7 @@
 		return NULL;
 	}
 	if (self->ob_size > 0) {
-		if (fwrite(self->ob_item, self->ob_descr->itemsize,
+		if ((int)fwrite(self->ob_item, self->ob_descr->itemsize,
 			   self->ob_size, fp) != self->ob_size) {
 			PyErr_SetFromErrno(PyExc_IOError);
 			clearerr(fp);