diff --git a/ch3-asm/ch3-04-func.md b/ch3-asm/ch3-04-func.md
index e247757..8e45c7e 100644
--- a/ch3-asm/ch3-04-func.md
+++ b/ch3-asm/ch3-04-func.md
@@ -90,8 +90,8 @@ TEXT ·Swap(SB), $0-32
 
 ```
 TEXT ·Swap(SB), $0
-	MOVQ a+0(FP), AX     // a = AX
-	MOVQ b+8(FP), BX     // b = BX
+	MOVQ a+0(FP), AX     // AX = a
+	MOVQ b+8(FP), BX     // BX = b
 	MOVQ BX, ret0+16(FP) // ret0 = BX
 	MOVQ AX, ret1+24(FP) // ret1 = AX
 	RET