diff --git a/Python/random.c b/Python/random.c
index d10dda9..da49bba 100644
--- a/Python/random.c
+++ b/Python/random.c
@@ -102,7 +102,7 @@
 py_getentropy(unsigned char *buffer, Py_ssize_t size, int fatal)
 {
     while (size > 0) {
-        Py_ssize_t len = Py_MIN(size, 256);
+        Py_ssize_t len = size < 256 ? size : 256;
         int res = getentropy(buffer, len);
         if (res < 0) {
             if (fatal) {