diff --git a/src/update_objects.c b/src/update_objects.c
index 0b3411f77..da867e84b 100644
--- a/src/update_objects.c
+++ b/src/update_objects.c
@@ -3250,7 +3250,7 @@ enum RandomItemOption {
  * New random item system uses chance based on percent
  * Likely functionally equivallent to the old system but easier to modify
  */
-u8 gen_random_item(s16 rank, s16 isCpu) {
+u8 gen_random_item(s16 rank, s16 option) {
 #define PERCENTAGE_BASE 100
     u16 rand = random_int(PERCENTAGE_BASE);
 #undef PERCENTAGE_BASE