diff --git a/sys/src/ape/lib/ap/386/vlop.s b/sys/src/ape/lib/ap/386/vlop.s
index 42e8a70df..1ad69f274 100644
--- a/sys/src/ape/lib/ap/386/vlop.s
+++ b/sys/src/ape/lib/ap/386/vlop.s
@@ -33,7 +33,7 @@ TEXT	_div64by32(SB), $0
 	MOVL	DX, 0(CX)
 	RET
 
-TEXT	_addv(SB), $0
+TEXT	_addv(SB),1,$0	/* used in profiler, can't be profiled */
 	MOVL	r+0(FP), CX
 	MOVL	a+4(FP), AX
 	MOVL	a+8(FP), BX
@@ -42,3 +42,13 @@ TEXT	_addv(SB), $0
 	MOVL	AX, 0(CX)
 	MOVL	BX, 4(CX)
 	RET
+
+TEXT	_subv(SB),1,$0		/* used in profiler, can't be profiled */
+	MOVL	r+0(FP), CX
+	MOVL	a+4(FP), AX
+	MOVL	a+8(FP), BX
+	SUBL	b+12(FP), AX
+	SBBL	b+16(FP), BX
+	MOVL	AX, 0(CX)
+	MOVL	BX, 4(CX)
+	RET