diff --git a/asm/macros/event.inc b/asm/macros/event.inc
index 15e74cbb6..14a1447ee 100644
--- a/asm/macros/event.inc
+++ b/asm/macros/event.inc
@@ -818,7 +818,7 @@
 	.byte 0x6d
 	.endm
 
-	@ Displays a YES/NO multichoice box at the specified coordinates, and blocks script execution until the user makes a selection. Their selection is stored in VAR_RESULT; 0 for "NO" or if the user pressed B, and 1 for "YES".
+	@ Displays a YES/NO multichoice box at the specified coordinates, and blocks script execution until the user makes a selection. Their selection is stored in VAR_RESULT as NO (0) or YES (1). Pressing B is equivalent to answering NO
 	.macro yesnobox x:req, y:req
 	.byte 0x6e
 	.byte \x