diff --git a/desmume/src/MMU.cpp b/desmume/src/MMU.cpp
index 12300cc77..85114b156 100644
--- a/desmume/src/MMU.cpp
+++ b/desmume/src/MMU.cpp
@@ -3121,7 +3121,7 @@ u32 FASTCALL _MMU_ARM9_read32(u32 adr)
 					case 0xB7:
 						{
 							/* TODO: prevent read if the address is out of range */
-							/* Make sure any reads below 0x8000 redirect to 0x8000+(adr%0x1FF) as on real cart */
+							/* Make sure any reads below 0x8000 redirect to 0x8000+(adr&0x1FF) as on real cart */
 							if(MMU.dscard[ARMCPU_ARM9].address < 0x8000)
 							{
 								MMU.dscard[ARMCPU_ARM9].address = (0x8000 + (MMU.dscard[ARMCPU_ARM9].address&0x1FF));