diff --git a/ports/renesas-ra/boards/make-pins.py b/ports/renesas-ra/boards/make-pins.py
index 98d7026c21c6..1b4588f02fe8 100644
--- a/ports/renesas-ra/boards/make-pins.py
+++ b/ports/renesas-ra/boards/make-pins.py
@@ -140,7 +140,7 @@ def parse_af_file(self, filename):
             for row in rows:
                 try:
                     cpu_pin_name = row[0]
-                    cpu_pin_port = int(row[1])
+                    cpu_pin_port = int(row[1], 16)
                     cpu_pin_bit = int(row[2])
                 except:
                     continue