diff --git a/boot/boothead.s b/boot/boothead.s
index 0ee36e1cf..f00b3f4dd 100755
--- a/boot/boothead.s
+++ b/boot/boothead.s
@@ -1255,7 +1255,7 @@ int86:
 0:
  cseg	cmp	ax, intret	! Needs to be changed?
 	je	0f		! If not then avoid a huge I-cache stall
-   cseg	mov	intret, ax	! Patch `INT n' or `RETF; NOP' into code
+   cseg	mov	intret, ax	! Patch 'INT n' or 'RETF; NOP' into code
 	jmp	.+2		! Clear instruction queue
 0:
 	mov	ds, 16(bp)	! Load parameters
diff --git a/boot/doshead.s b/boot/doshead.s
index c1a41ec38..86f5621e4 100755
--- a/boot/doshead.s
+++ b/boot/doshead.s
@@ -1145,7 +1145,7 @@ o32 eseg mov	(0x046C), eax	! Clear BIOS clock tick counter
 	push	intret+2	! Far return address
    o32	push	12(bp)		! Far driver address
 	mov	ax, 0x90CB	! RETF; NOP
-0: cseg	mov	(intret), ax	! Patch `INT n' or `RETF; NOP' into code
+0: cseg	mov	(intret), ax	! Patch 'INT n' or 'RETF; NOP' into code
 
 	mov	ds, 16(bp)	! Load parameters
 	mov	es, 18(bp)